Free Essay

Mass Wating

In: Science

Submitted By yahooGoogle
Words 1993
Pages 8
Austin Pope
Lesson 17 Exercise
29 April 2015

1. What do the various kinds of rocks used for monuments tell us about weathering?
There are three principal types of stone used in the structures, pedestals, and ornament of the many monuments that may be found throughout the parks system: granite, limestone, and marble.
Granite, an igneous rock, is formed through the cooling and crystallization of molten bodies within the earth. It is dense and durable. Limestone is a sedimentary rock comprised mainly of the mineral calcite and formed through the compression of mostly marine organisms in pre-historic times. It can be soft and flinty and porous and, though easy to cut and tool, it is susceptible to weathering from the effects of acid rain and other pollutants. Marble is created through a metamorphic process in which heat and pressure cause the recrystallization of sendimentary carbonate rocks, and is related to limestone. It is often prized for its variegated color and veining, but may also be found in a pure white. Most marble, especially the colorful variety, is actually limestone, though commercial quarries and vendors, unlike geologists, tend to distinguish the two. Marble is also highly vulnerable to damage from weathering and pollutants. As used in monuments, the same granite and marble may have a strikingly different appearance and coloration depending on whether their surface treatment has a flame finish, honed surface, or polished treatment.

2. What rock-forming minerals found in igneous rocks weather to clay minerals?
Clay minerals are produced as residual minerals during the weathering of feldspars and Micas.

3. How does abundant rainfall affect weathering?
Rainfall and temperature can affect the rate in which rocks weather. High temperatures and greater rainfall increase the rate of chemical weathering. Rocks in tropical regions exposed to abundant rainfall and hot temperatures weather much faster than similar rocks residing in cold, dry regions.

Austin Pope
Lesson 17 Exercise
29 April 2015

4. Which weathers faster, a granite or a limestone?
Limestone because of its mineral property, which is composed of mainly calcite which is weaker than granite and the minerals it usually is made up of, quartz, feldspar, mica.

5. How does physical weathering affect chemical weathering?
Physical weathering increases the surface area that can be attacked by chemical weathering.

6. How do climate affect chemical weathering
Humidity and temperature are the keys to chemical weathering .Chemical weathering needs water, to act as a solvent and to transport corrosive ions so chemical weathering in arid climates, and in arctic climates (where water is frozen, and so not available) have little if any chemical weathering. Chemical processes are also (mostly) accelerated by higher temperature so the high humidity and high temperature of the tropics is the place where chemical weathering predominates. Contribution of humic acids from soils is also important, and the high rate of growth of plants in tropical climates is also a factor.

7. What role do earthquakes play in the occurrence of landslide?
Earthquakes are commonly triggers, providing energy that causes a slope to fail.

8. What kinds of mass movements advance so rapidly that a person could not outrun them?

Avalanches. Lahars, Neue Ardentes or pyroclastic flows,and rockfalls,

Austin Pope
Lesson 17 Exercise
29 April 2015

9. How does the absorption of water weaken unconsolidated material?
Unconsolidated materials are those that have not been packed and/ or pressed by any natural or human means, allowing small pockets of air going in and out of the material in question. The water absorption occurs by direct contact or by the condensation of moisture in the air, a process of oxidation occurs and oxygen is released into the atmosphere, leaving an empty space in the basic structure of the material in question. With time, the material degrade.

10. What is the angle of repose and how does it vary with water content?
Angle of repose is the steepest angle that unconsolidated material naturally rests. Very wet sediment angle < slightly wet sediment angle < very wet sediment angle.

11. How does the steepness of a slope affect mass wasting?
In unconsolidated material, the steeper the slope, the greater the risk for mass wasting, all other factors being equal. In consolidated materials, there is little mass wasting most of time, but joints and faults can increase the likelihood, and earthquake can act triggers. When steep consolidated material is wasted, it is rapid and dangerous.

As slope gets steeper, the shear stress component get larger relative the friction component, leading to failure. Consolidated slopes can be very steep before they fail, whereas unconsolidated slopes usually fail at less steep angles.

Austin Pope
Lesson 17 Exercise
29 April 2015

12. What is a mudflow, and how it is produced?
Mudflow alludes to a stream of water that contains a lot of suspended particles and sediment. It has a higher density and viscosity than a streamflow and can store just the coarsest part of its heap; this reasons irreversible silt entrainment. Its high density and viscosity won't permit it to stream similarly as a water stream.
Mudflows happen on steep slopes where vegetation is not sufficient to avert quick erosion but rather can happen on gentle slopes if different conditions are met. Different components are substantial precipitation in brief times and an effortlessly erodible source material. Mudflows can be produced in any climatic administration yet are most basic in bone-dry and semiarid regions. They may surge down a mountainside at velocities as awesome as 100 km (60 miles) every hour and can bring about extraordinary harm to life and property. Boulders as large as houses have been moved by mudflows.Mudflow stores are inadequately sorted mixtures of ilt, boulders, organic materials, and other debris. They have sudden and very much characterized edges, sporadic surfaces, and a lobate appearance; they may be 3 to 6 m (10 to 20 feet) high. Such stores are far reaching on alluvial fans and around the bases of numerous volcanoes

Austin Pope
Lesson 17 Thought Questions
29 April 2015

1. In Northern Illinois, you can find two soils developed on the same kind of bedrock: one is 10000 years old and the other is 40000 years old. What differences would you expect to find in their compositions or profiles?
In Northern, the old, upland soils are mostly Mollisols and Alfisols, with an occasional Spodosol up north and Histosols scattered about in low spots.

* The central concept of Mollisols is that of soils that have a dark colored surface horizon and are base rich. Nearly all have a mollic epipedon. Many also have an argillic or natric horizon or a calcic horizon. A few have an albic horizon. Some also have a duripan or a petrocalic horizon.

* The central concept of Alfisols is that of soils that have an argillic, a kandic, or a natric horizon (prominent B) and a base saturation of 35% or greater. They typically have an ochric epipedon, but may have an umbric epipedon. They may also have a petrocalcic horizon, a fragipan or a duripan.

* The central concept of Spodosols is that of soils in which amorphous mixtures of organic matter and aluminum, with or without iron, have accumulated. In undisturbed soils there is normally an overlying eluvial horizon, generally gray to light gray in color, that has the color of more or less uncoated quartz. [bleached E horizon]
Most Spodosols have little silicate clay. The particle-size class is mostly sandy, sandy-skeletal, coarse-loamy, loamy, loamy- skeletal, or coarse-silty.

* The central concept of Histosols is that of soils that are dominantly organic. They are mostly soils that are commonly called bogs, moors, or peats and mucks.
A soil is classified as Histosols if it does not have permafrost and is dominated by organic soil materials

2. Which igneous rock would you expect to weather faster, a granite or a basalt? What factors influence your choice?
The basalt will chemically weather faster since granite contains quartz which is not chemically weathered. Also, granite is used for headstones and does not chemically weather fast.

Austin Pope
Lesson 17 Thought Questions
29 April 2015

3. Assume that a granite with crystal about 4mm across and a rectangular system of joints spaced about 0.5 to 1m apart is weathering at Earth’s surface. What size would you ordinarily expect the largest weathered particle to be?
Mean joint spacing appears to decrease from fresh, through slightly and moderately weathered granitic rock, then increases from moderately weathered rock, through highly and completely weathered granitic rock. The widest joint spacing occur in either fresh or completely weathered rock, and the closest, in moderately weathered rock. Mean joint trace lengths decrease from fresh rock to slightly weathered rock, increase in moderately weathered rock, then appear to shorten from moderately weathered rock through highly and completely weathered granitic rock. The shortest mean trace lengths occur in completely weathered granitic rock, and the longest, in moderately or highly weathered rock.

4. Why do you think a road built of concrete, an artificial rock , tends to crack and develop a rough, uneven surfaced in a cold, wet region even when it is not subjected to heavy traffic?

Freezing-thawing damage is a major degradation mechanism for concrete structures in cold regions. This damage becomes more severe when coupled with deicing salts application.

5. Pyrite is a mineral in which ferrous iron is combined with sulfide ion. What major chemical process weathers pyrite?

It might weather by oxidation. After it is oxidized it might form hematite, magnetite, and sulphate minerals.

6. Rank the following rocks in the order of the rapidity with which they weather in a warm, humid climate: a sand stone made of pure quartz, a limestone made of pure calcite, a granite, a deposit of rock salt (halite, NaCl).
Most rapid to most slow: Halite, limestone, arkose, granite, sandstone, quartz.,

7. What would a world look like if there were no weathering at the surface?
Without weathering, geologic features would build up but would be less likely to break down.

Austin Pope
Lesson 17 Thought Questions
29 April 2015

8. Would a prolonged drought affect the potential for landslide? How?

Yes. Landslides are caused by disturbances in the natural stability of a slope. They can happen after heavy rains, droughts, earthquakes or volcanic eruptions.

9. What geological conditions might you want to investigate before you bought a house at the base of a steep hill of bedrock covered by a thick mantle of soil

Geological conditions such as dip of bedding planes, fault plane, slope and nature of Earth material. The bedding planes of the bed rocks dip away from the slope and slope that is composed of igneous rock should be relatively stable.

10. What evidence would you look for to indicate that a mountainous area had undergone a great many prehistoric landslide?

Poorly vegetated scars where the slide turned loose, Deposits of fine to very coarse or mixed particles size materials at the base of the slope where the flow lost energy.

11. What factors would make the potential for mass movements in mountainous terrain in the rainy tropics greater or lesser than the potential in a similar terrain in a desert?

Soil saturation, or if the rainfall rate is greater than the rate at which water can infiltrate into the soil, surface runoff occurs. If the runoff has sufficient flow energy, it will transport loosened soil particles (sediment) down the slope.

12. What kind(s) of mass movements would you expect from a steep hillside with a thick layer of soil overlying unconsolidated sands and muds after a prolonged period of heavy rain?
Mass Wasting

Austin Pope
Lesson 17 Thought Questions
29 April 2015

13. What factors weaken rock and enable gravity to start a mass movement?
Physical weathering breaks down rock. Water, rivers, frost, plants, animal activity, changes in temperature are examples. Chemical weathering also has an impact also. Oxidation, dissolution, carbonation and acid rain are examples.

Similar Documents

Free Essay


...Statics of Rigid Bodies STATICS OF RIGID BODIES Chapter 1: Introduction Department of Engineering Sciences enter 〉〉 Statics of Rigid Bodies DEFINITION Mechanics • the study of the relationship among forces and their effects on bodies. • the science which describes and predicts the conditions for rest and motion of bodies under the action of forces. • a physical science (for it deals with physical phenomena) Prev Department of Engineering Sciences Jump to… Stop Show Next Statics of Rigid Bodies MECHANICS MECHANICS RIGID BODIES STATICS bodies at rest DYNAMICS bodies in motion DEFORMABLE BODIES INCOMPRESSIBLE FLUIDS COMPRESSIBLE Prev Department of Engineering Sciences Jump to… Stop Show Next Statics of Rigid Bodies What is a FORCE? represents the action of one body on another that tends to change the state or state of motion of a body. may be exerted by actual contact or at a distance (e.g. gravitational and magnetic forces). characterized by its point of application, magnitude and direction. represented by a vector. Prev Department of Engineering Sciences Jump to… Stop Show Next Statics of Rigid Bodies Effects of a FORCE • development of other forces (reactions or internal forces) • deformation of the body • acceleration of the body Applied Force Prev Department of Engineering Sciences Jump to… Stop Show Next Statics of Rigid Bodies Development of other......

Words: 534 - Pages: 3

Free Essay


...------------------------------------------------- Top of FormImperial SG - specific gravity of fluid d - int. diam. pipe or bend (inches)v - velocity of fluid (ft/s)β - turning angle of bend (o)p - gauge pressure (psi)Bottom of Form | The resulting force on a thrust block or anchor depends on the fluid mass flow and flow velocity and the pressure in the bend. Resulting force due to Mass flow and Flow Velocity The resulting force in x-direction due to mass flow and flow velocity can be expressed as: Rx = m v (1 - cosβ)         (1)     = ρ A v2 (1 - cosβ)         (1b)     = ρ π (d / 2)2 v2 (1 - cosβ)         (1c) where Rx = resulting force in x-direction (N) m = mass flow (kg/s) v = flow velocity (m/s) β = turning bend angle (degrees) ρ = fluid density (kg/m3) d = internal pipe or bend diameter (m) π = 3.14... The resulting force in y-direction due to mass flow and flow velocity can be expressed as: Ry = m v sinβ         (2)     = ρ A v2 sinβ         (2b)     = ρ π (d / 2)2 v2 sinβ          (2c)    Ry = resulting force in y direction (N) The resulting force on the bend due to force in x- and y-direction can be expressed as: R = (Rx2 + Ry2)1/2         (3) where R = resulting force on the bend (N) Example - Resulting force on a bend due to mass flow and flow velocity...

Words: 632 - Pages: 3

Premium Essay

Heat describe something is called: d) data   2. One-half liter of water has a mass of  c) 500 grams   3. considering that a very small portion of a material that is the same throughout with that of a larger portion of the same material, the density of the small sample will be:  c) much less   4. A scientific law can be expressed as:  d) all is correct  5. When a scientist measure volume as a property of it is to determine:   c) how much space an object occupies   6. The mass of water in a 40 Liter aquarium is equal to: b) 40.00 kg    7. A ball rolling across the floor slows to a stop because:  b) there is a net force acting on it.   8. If an object is falling near the Earth surface and ignoring air resistance, the acceleration will:  b) remain constant   9. If you double the mass of a cart while it is undergoing a constant unbalanced force, the acceleration will:  a) decreased by half   10. If an object is falling towards the Earth surface and ignoring air resistance, the velocity will be:  a) increasing   11. Motion can be measured in all three variables; speed, velocity and acceleration:  b) False  12. The net force on object is regarded as:  d) the sum of all the forces acting on the object  13. The second law of motion states that:  b) a body of 1.0 kg in mass requires 1 Newton force to accelerate at 1.0 M/S2    14. The momentum of an object is given the product of the mass of the object and its velocity:  a) True   15. In the absence of external......

Words: 417 - Pages: 2

Free Essay


...To all the things that we do not perceive but are there for us to see are call Environmental Stimulus and we call Attended Stimulus to those things in our environment that catch our attention, the things to which we pay attention. One’s a perception happens we recognize the object or situation another proses began to transform this information into action according to our knowledge. This one is always influence by our knowledge, colors and interest. This information brought to a situation can be something learned time ago or knowledge gained by events previews to the present event. In this subject there are some tools that help us perceive they are call fundamental quintiles. They work thru our knowledge and help us recognize position, mass, or displacement. Example on a play perception of the audience is different than what goes on behind the séance. Behind the séance there are so many thinks going on that we are not aware of. On the other hand for someone when is on the audience and has work as on a play would have a different perception then everyone else, he might see the nerviest from the actors, or would see details that no one else can see. This is because our knowledge changes the perception of what we see or hear. In this example we see that the Environment stimulus is all thinks that we can potentially perceive like the trees or flowers. Aon the other hand the attended stimuli would be the bear. The process is constantly repeated all the time, our body gas......

Words: 922 - Pages: 4

Free Essay

Key Word Outline

...Key Air Force Leadership Message Briefing INTRODUCTION Attention: How many of you every time you use the restroom you remember to cut off the light? Purpose/Motivation: I’m standing her to brief you about Energy Awareness in the Air force not just cutting off the lights when you leave a room but a Multidimensional approach to energy efficiency Overview: I’ll cover our main mission which is to fly, fight and win in the air, space and cyberspace, our Air Force Facilities, and the overall culture change Transition: The Air Force doesn’t just care about energy for energy’s sake we care about how it affects the mission of the air force BODY MP1 Fly, Fight and Win * Aviation Fuel and Facilities cost us about 9 billion per year * Through Programs like AFSO 21 1. “token offload fuel” 1000 pounds to 100 pounds Transition: Just fixing are fuel issues aren’t just it are energy cost as a whole is the highest in the DOD MP2: Air Force Facilities * Wind energy of Cape Cod * Solar Energy * Smart facilities * Are views as af Transition: I never in my wildest dreams thought energy efficiency was so important and how it effects each and every one of us CONCLUSTION Summary: I talked to you about the potential of Energy Awareness how we plan to implement fixes for fuel and facilities and how opinions are important Re-Motivation: we must continue to find ways to save money because we are a smaller AF, Reducing demand,......

Words: 283 - Pages: 2

Premium Essay

Critical Angle

...Activity 6 - Critical Angle Jairrus Publico1*, Reinner Pagayon2, Clauzette Lofamia3, Jessamine Draper4 National Institute of Physics, University of the Philippines, Diliman, Quezon City *Jairrus Publico: Abstract This paper discusses how to determine the coefficient of static friction by finding the critical angle between two different surfaces in contact on an inclined plane. It aims to determine the coefficient of static friction between two surfaces in an inclined plane by measuring the critical angle θc, the steepest angle of incline in which the mass in contact does not slide. This paper also aims to show the relationship between the materials in contact and the effect of their masses to the critical angle θc. The experiment also shows the accuracy of using Newton's second law in measuring the coefficient of static friction. Keywords: static friction, coefficient of static friction, critical angle 1. Introduction Friction is the force that opposes motion. It is the resistance of surfaces moving against one another. It is a force that plays a very important role in our lives. Without it, we cannot walk, do our daily chores, and even slide endlessly due to external forces. This phenomenon remained unknown to the early people until Leonardo Da Vinci (1452-1519) studied and analyzed its importance in machines. He observed that different materials in contact move with varying ease. He stated the following laws; first,......

Words: 1666 - Pages: 7

Premium Essay


...dictionary, physics is the science of matter and energy and of interactions between the two. In all physics consists of energy, kinetic energy, potential energy, velocity, acceleration, mass, force, and gravity. Without physics many things would not be possible. In fact, when a person is driving their car they are suing momentum (the quantity of motion of a moving object) and acceleration. Over time our general understanding of physics has helped us develop greater technology than society thought possible. For example, many years ago society believed that flight was impossible until two brothers, the Wright brothers, invented the aircraft. Now of course that was with many trial and errors. According to Bernoulli principle an increase of a flow results in a decrease of pressure. When air hits the leading edge the airflow above the wing travels faster than the flow below the wing. So therefore, the pressure below the wing will be higher than the air pressure above the wing. Because of this difference in pressure, lift is created, and pushes the wings upward. Be that as it may, this is not the only physics principle at work One must also apply Newton’s 1st (every body remains in a state of rest or uniform motion unless it is acted upon by an external unbalanced force), 2nd (a body of mass subject to a force undergoes an acceleration), and 3rd law (for every action there is an equal and opposite reaction). As one can see physics applies to many things in...

Words: 295 - Pages: 2

Premium Essay


...Sara Gutierrez De Piñeres Conclusions: Length vs. Period: By looking at the graph of Length vs. Period one can conclude that as the length gets longer the period will increase. When two pendulums have different lengths but the same amplitude, the shorter pendulum will have a smaller arc to travel through. Because the distance the mass travels from maximum displacement to equilibrium is less while the acceleration of both pendulums remains the same, the shorter pendulum will have a shorter period. Mass vs. Period: The graph done in class can show how the change in mass does not affect the period. An example that can demonstrate this kind of behavior is when the bobs of two pendulums differ in mass, the heavier mass provides a larger restoring force, but it also needs a larger force to achieve the same acceleration. This is in some way similar to the situation for objects in free fall, which all have the same acceleration regardless of their mass. Because the acceleration for both periods is the same, the period for both is also the same. Amplitude: The graph recorded shows how the amplitude does not affect the period of a pendulum either. When the amplitude of a pendulum increases, the restoring force also increases proportionally. Because force is proportional to acceleration, the initial acceleration will be greater. However, the distance this pendulum must cover is also greater. If you consider small angles, for example, the effects of the two increasing......

Words: 256 - Pages: 2

Premium Essay

Marketing Mix

...To day doctors are using Body Mass Index as the guide lines. One pound of body fat is same as one pound of butter. You can buy various kind of butter with calorie level of 3000 to 3600. 1500 to 1800 is very low daily intake. Most show 2000 to 4000. Again each individual is different, it depends on the metabolism of the individual. Say a person needs 2000 calories per day, and a person is over weight by 20 pounds only. Then by reducing the intake by 200 calories it will take him 15 to 18 days to loose 1 pound. So it will take about 1 year to loose all the weight that the person needs to loose. If every thing is correct but say the person also engages in an additional activities besides reducing the calories, say runs 1 mile and that burns 200 calories then it will take only 6 month to achieve this goal. By the way most diets for weight reduction are around 1500 calories. If a person goes on a diet with less then 1200 calories, the person will gain weight, but will feel sleepy and weak. Body actually shuts down, and conserves energy. ************************************** Life Style Change Program for Loosing Weight By minootoo Who needs to loose weight? Answer is simply not every one, only the over weight person. Who is over weight? This is simple, it is easy to find out and it is available on line, it is call Body Mass Index, and calculations are simple. According to this calculation if you find your self say only 10 pounds more, you may not be......

Words: 1558 - Pages: 7

Premium Essay

Critical Mass - Case Study Analaysis

...Creativity and Business Innovation Prof. Stefan Meisiek Case Analysis of Critical Mass : The IT Creativity Challenge Piyush Choudhary 2013962348 Executive Summary Critical Mass is a highly successful digital marketing service firm with a its major clientele part of the Fortune 500 group. The Internet industry of which Critical Mass is a part is changing a lot. The social media tools have created a generation that has access to a lot more information. Consumers are becoming highly demanding in making creativity and innovation a must for the success of Critical Mass Inc. The company had invested a lot of resources to achieve a so called creativity inducing environment and organized a plethora of activities to ensure that the creative juices kept flowing. At this juncture the company is at the crossroads to take its next step towards a significant expansion in its client base. As a result Brian Kramer (Tech Director) and Gordon Bunk (Senior VP and MD) have decided to inspect and revaluate the current practices followed in the firm to determine whether they were having the required effect make necessary changes to make them more meaningful and result oriented. 1 |Page Creativity and Business Innovation Prof. Stefan Meisiek Introduction Critical Mass was setup in 1995 by Ted Hellard and Michael Clairo with the intention of being a interactive golf CD-ROM development company. As a part of the plan Hellard went to pitch his interactive golf CD-ROM to Mercedes Benz......

Words: 1824 - Pages: 8

Free Essay

Whale Rider

...Whale Rider was a movie produced in 2003, and it is about a girl named Paieka, or Pai. She is the granddaughter of Nanny Flowers and Koro. In the beginning of the movie, Koro has a good relationship with Pai. He brings her to school everyday by giving her a ride on his bike, and everything is good between them. Later on in the movie, Koro is worried about the rest of his people since they are drifting away from the traditions. People are smoking, the men are drinking and shooting pool, and the children do not take the ancestor celebrations seriously. Koro realizes that there is going to have to be a new leader, but his only option would be to have his granddaughter be leader, which goes against tradition. Pai is determined to prove to Koro that she could be a good leader even though she is female, and throughout the film, she tries to get Koro to acknowledge that she would be the best option for leader. Koro starts a school for the boys to find out who would be the best leader out of all of the boys in the village. He does numerous things with the boys to train them to be a chief, and Koro is planning to eventually pick the best leader out of everyone that he is teaching. Koro does not allow Pai to learn how to be chief in his training school since she isn’t a man. Pai learns how to stick fight from her uncle, and eventually defeats a boy in a stick fight. Koro saw this, and yelled at Pai for it, since that is not what women are supposed to do. Pai later......

Words: 978 - Pages: 4

Premium Essay

Fat vs Protein

...Proteins - essential to growth and repair of muscle and other body tissues Fats - one source of energy and important in relation to fat soluble vitamins Carbohydrates - our main source of energy Minerals - those inorganic elements occurring in the body and which are critical to its normal functions Vitamins - water and fat soluble vitamins play important roles in many chemical processes in the body Water - essential to normal body function - as a vehicle for carrying other nutrients and because 60% of the human body is water Roughage - the fibrous indigestible portion of our diet essential to health of the digestive system What are the daily energy requirements? Personal energy requirement = basic energy requirements + extra energy requirements Basic energy requirements (BER) includes your basal metabolic rate (BMR) and general daily activities For every Kg of body weight 1.3 Calories is required every hour. (An athlete weighing 50Kg would require 1.3 × 24hrs × 50Kg = 1560 Calories/day) For a calculation of your BMR, see the calculator on the Resting Daily Energy Expenditure (RDEE) page Extra energy requirements (EER) For each hours training you require an additional 8.5 Calories for each Kg of body weight. (For a two hour training session our 50Kg athlete would require 8.5 × 2hrs × 50Kg = 850 Calories) An athlete weighing 50Kg who trains for two hours would require an intake of approximately 2410 Calories (BER + EER = 1560 + 850) Energy Fuel Like......

Words: 363 - Pages: 2

Premium Essay


...heights of the incline and then investigate how the final velocity depends on its initial release height and what the relation between the work and the change in kinetic energy. EK1=0 EK2=1/2mv2 The work is done by the x-component of gravity. W=mgsinθ×L=mgH ( unit is kg·m/s2·m=kgm2/s2) v2-0=2as v2=2as=2gsinθ×L=2gH v= (2gH)1/2 The final velocity depends on the height. It is not necessary related with the angle and mass. EK2=1/2mv2 (unit is kgm2/s2) EK2-EK1=1/2mv2-0=1/2m·2gH=mgH W=EK2-EK1 The work done by the gravity on the cart is equal to the change in kinetic energy. Procedure: 1. Practice: Vary track angles, release heights, and cart masses. And then release the cart form the rest. During each trial, measure the time when the cart reaches to bottom of the incline. 2. Vary release heights: Set the track angle which is 4.9° and the mass which is 190g. Release the cart from three different heights and take video for all of them. Data: H1=24cm, L1=153cm sinθ=0.157 θ=9.02° H2=13cm, L2=153cm sinθ=0.085 θ=4.9° 1. Practise: Change angles θ | 4.9° | 9.02° | t | 1.68s | 1.72s | Change masses m | 190g | 210g | t | 1.68s | 1.70s | Change heights L | 100cm | 120cm | t | 1.68s | 2.11s | 2. Vary height (set θ=4.9°, m=190g) L=60cm ......

Words: 745 - Pages: 3

Premium Essay

Activity 6

...– Motion and Gravity There are two parts for this activity. You will work on both parts described below and also comment on one other student’s work. The first part is to learn how a net force causes acceleration, described by Newton’s second law F = ma. Read the Introduction and Objectives to understand the concept. In Lesson 1, you will see this simulation page: [pic] Play with this simulation by choosing three different masses (AVOID CHOOSING THE SAME MASS USED BY OTHER STUDENTS) . By clicking the button “Push”, you will produce a speed vs time graph (do it for three different masses), and then use F = ma to calculate the acceleration for each mass. Record the mass and acceleration values in the table below: |Mass 1 = 120 |a1 =.83 (100/120) | |Mass 2 = 180 |a2 =.55 (100/180) | |Mass 3 =300 |a3 =.33 (100/300) | Now you should have three straight lines in the graph. Each calculated acceleration should represent the slope of the corresponding line. Take a screen-shot of your graph image and then paste it here。 Use your graph to determine the slopes and compare it with three acceleration values in your table. [pic] The second part is study......

Words: 530 - Pages: 3

Premium Essay

Personal Change Management

...ORGANISATION STRUCTURE AND DYNAMICS Assignment on Personal Change Submitted to: Prof. Milind Agnihotri Submitted by:- Nisha Bathija 65152 Personal Change Goal: - To exercise regularly and to stop eating junk food. Driving Forces: * To be determined towards achieving my goal * Waking up early and on time * Eating right * Following a fixed schedule Restraining Forces: * Inherent laziness * Lack of commitment * Attraction towards junk food * Lack of self discipline Ratings given in order of importance (A being the most Important followed by B and C): Driving Forces * Being determined (A) * Waking up early (A) * Eating on time (B) * Following a fixed schedule (B) Restraining Forces * Plain lazy (A) * Commitment towards achieving the goal (B) * Restraining from junk (B) * Self Discipline (B) Action Strategy: For increasing my driving forces, I would: * Be optimistic about achieving my goal * Try and sleep early and wake up early * Eat “Right” For decreasing my restraining forces, I would: * Get less attracted towards junk food * Get self disciplined * Increase my commitment level towards achieving my goal. To start with I would first like to tell you why I chose “Losing Weight” as my goal. It all started in the first trimester where we the students of FSB 1 had to decide which Sport option we would like to opt for. I being an athlete in school chose Mixed......

Words: 852 - Pages: 4