...A collision occurs when two objects collide together creating an external force that is either zero or smaller. The goals of this lab were to find out what happens to the linear momentum and kinetic energy of different objects when they collide. Also, what happens to the momentum and kinetic energy in a completely inelastic collision and perfectly elastic collision? For completely inelastic collision the linear momentum should be conserved, but the kinetic energy should not be conserved. On the other hand, the linear momentum and the kinetic energy should both be conserved during perfectly elastic collision. Kf / Ko should equal one for perfectly elastic collision and, it should equal the mass of 1 divided by the sum of the mass 1 and 2 for...
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...to spend the rest of his life in hell, just to be able to hang with his wife for eternity. The movie begins with the encounter of the two soul mates, both who were spending their time on their sailboats, one of which had a red sail symbolizing seduction, love, sexuality, but also sacrifice and danger, the boat was owned by Annabella Sciorra who is played by Annie Nielsen , who happens to be Chris’ wife later on the movie. They strongly fall in love with each other and they had 2 children, Ian and Marie , played by Josh Paddock and Jessica Brooks Grant, both who died after being involved in a collision and the tragic event destroys Annabella and Chris’ life by leaving an empty space in their heart. The quietness of their house and the uncertainty of their future made Anabella have a mental breakdown and after going through a rough path, his husband (who is a doctor), dies in an car collision accident; while he was trying to save someone who was trapped inside their car after being flipped over by impact of his car and the other vehicles colliding. After this other tragedy she sees suicide as her only escape from that nightmare and without knowing the “rules” of heaven she kills herself condemning her soul to an eternity in hell and without any chance of seeing paradise and her family. Chris Nielsen is a perseverant and secure...
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...driving. In today’s world, car collisions are one of the major causes on deaths in the United States. Thousands of people die every year from car collisions due to driver error, some of which are: drinking and driving, texting while driving, and not wearing a safety belt. The Alive at 25 course is meant to teach young adults the hazards that come with unsafe driving, in the hopes that they will become better and safer drivers so that they will not end up in the emergency room or the morgue due to a car collision. In this essay, I will cover some of the main topics we discussed in the Alive at 25 course and I will outline what I have learned from this material. One of the first topics we discussed in class was some of the statistics that have been developed in regards to car collisions within specific age groups. The Alive at 25 course focuses on the 15-24 year old age group, this group is known as Group 1, as people in this age group are the youngest amongst drivers in the United States. Motor vehicle crashes are the number one cause of death of 15-24 year olds with almost 11,000 people dying every year. We also discussed some percentages of drivers who are considered Group 1 (age 15-25), drivers in this age group consist of: 14% of licensed drivers, 27% of all people involved in collisions, 21% of people who die from collisions with other vehicles, 34% of people who die from collisions with fixed objects, 28% of people who die from non-collision events (such as a car flipping)...
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...Introduction When an object collides with another, momentum is conserved, but kinetic energy is not. This experiment was designed to find if the coefficient of restitution, e, changes for high-velocity collisions. At low velocities colliding objects will tend to maintain their shape, size and elasticity, so e is likely to be constant over a range. However, at high velocities colliding objects may change their physical properties and therefore a change (probably a reduction) in e may be observed. A small reduction in e was observed, but this was probably accounted for by air resistance and not a change in the material. Theory When a collision occurs, total momentum is conserved, but kinetic energy is not. When a ball, for example, bounces off the floor, it loses a little momentum to the Earth so the total momentum of the system is unchanged. Its KE, given by the formula [pic], assuming it was dropped from rest, will reduce and it will bounce to a height lower than its original height, as shown in diagram 1: Diagram 1: ‘H’ is drop height and ‘h’ is bounce height. The coefficient of restitution is the ratio of the difference in the initial speed and the final speed: (i) is the general formula for e, (ii) is when distances are measured on a drop (one object is stationary), and (iii) is when velocities are measured and one of the objects is stationary. Equation (ii) will be used here. Method Apparatus: Rubber ball, camera, floor...
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...When we hear the world collision the first thing we think is crash. In scientific words collision occurs when more than two objects collide against each other as a result, the born of many physics forces like momentum, impulse, inertia and friction. But what is the relationship between collision and a car crash? What we may not notice is that physics is all around us in our life and every life event involves its. The path we take every morning in our way to school, the traveling of the car is a very good example. Studies prove and affirm that the survivors of severe car crashes, survive thanks to the way of protection they used and how is the car designed with specific and special safety precautions. That was our main point we wanted to achieve while making our car for the project. Our design was basically a truck like a jeep. It was all made up of carboard, wood and other small details that beenfit the truck to make it heavier, more rough and hard. It was also covered with newspaper, as a result, giving the car a very hard texture. The passengers seat, was made up all of soft materials like cotton, pads and sponges. The egg was attached with two rubber strings, simulating a safety seat bealt and helping as a support for the egg. All this details and spefcific design had a main goal and something specific to achieve: preventing the egg from breaking and keep it secure in its seat. The demostration of collision and all its forces acting against in this experiment consisted...
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...people: if they are not disciplined enough they could miss evidence or could arrest the wrong person because they couldn’t be bothered to work properly.(Codes of Professionalism) They need discipline so that they can report to emergencies properly and on time, like at a robbery: if they don’t get there on time they could miss the suspect or if they go there not paying attention someone could get hurt, whether that be hostages or people in the street. Fire and Rescue – Fire and rescue services like the Fire brigade need discipline because if they didn’t, the chance of people being harmed and the chance of accidents rises. They need discipline because they need to be able to get to accidents quickly, like getting to a fire or getting to a collision: if they are not disciplined, they could be on call and an accident could happen and they would just casually take their time getting there, people could die or be harmed. They need to be disciplined because they need to follow the rules ‘by the book’ because the rules have been made to save lives: if they have no discipline...
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...By partaking in three unique scenarios of both elastic and inelastic collisions, I was able to conclude that speed and velocity are both conserved. This conclusion was made through the change in velocity of a cart relative to its "crasher". For example: throughout the different-mass elastic collisions, the speed that which the cart started and ended were equivalent - indicating that there was conservation of speed, in addition to the complete transfer of velocity. However, in the different-mass elastic collisions, the transfer of the speed of the cart was not complete, but instead, the lighter cart moved quicker than the heavier cart. This shows us that although force may be the same, the transfer of momentum shows us why the lighter cart moves more quickly than the slower. Throughout our previous unit, we described the constant velocity of objects in motion. That laid the basis for this next unit, where we will be studying why and how the object moves the way it does, specifically the "push" or "pull" of force. The heavier cart in a same-direction elastic collision seems to push the lighter cart, which causes an increase in speed for the lighter cart. Although we may have brushed on the surface of movement, this unit will pave the path for further investigation on velocity as well as momentum. According to today's lab, it is possible to measure the mass of the carts and then multiple the mass by the velocity to determine momentum. These two things will be related to almost...
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...South Asia Disaster Report 2007 Chapter 13 Other Man made Disasters Introduction Man made disasters cover a wide range of events created largely due to accidents, negligence or sometimes even by human design, which result in huge loss of lives and property every year in South Asia. These include road, rail, river, marine and aviation accidents, oil spill, building and bridge collapse, bomb blast, industrial and chemical accidents etc. These also include the threats of nuclear, biological and chemical disasters. At present there is no organized system for collecting data on man made disasters. EM-DAT does collect data on some technological disasters, but these do not cover the complete range of information on man made disasters. As per EM-DAT sources a total of only 21 technological disasters had affected the countries of South Asia killing 569 people, but road accidents alone had reportedly killed more than 135,000 people which is several times more than the total number of persons killed due to natural disasters. Table 12.1 Technological disasters in South Asia in 2007 (Appendix-VI). Country Number of incidents Number of Persons Killed Afghanistan 1 40 Bangladesh India Nepal Pakistan Sri Lanka Total 1 13 3 2 1 21 41 362 61 65 569 Source: EM-DAT, The CRED International Disaster Database As per estimate by World Health Organisation (WHO) by 2020 the road crash injuries will be the third highest threat to public health...
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...When an officer comes to the scene of an accident, he or she does a few standard things. 1. Secure the scene 2. Check for and treat injuries 3. Prevent fires and other crashes 4. Photograph the scene 5. Field sketch and measurements 6. Locate and interview witnesses and drivers 7. Exchange information and complete the crash report 8. Tow vehicles 9. Re-establish traffic flow as soon as possible, especially on major roads and around rush hours 10. Cite the violator I would like to go over each of these and give what they mean. An officer's responsibility to conduct a motor vehicle collision investigation begins at the time he or she is directed to the collision scene. It is at that precise moment that the officer should begin to obtain as much information as it is available from the radio operator, such as type of collision, location, extent of injuries, traffic condition, etc1.then the officer should at the set speed for the department procedures of running code to a scene proceed to and secure the scene. If medical attention is needed, the officer will call it in, but assuming that there is no such need, the officer’s first job is to. This is the 1st of the 10 things we as police should do. the patrol vehicle is the first available tool to use in traffic control, other devices such as plastic traffic cones and flares can also be used. They help to channel other cars away from the scene. when the first responding officer has evaluated the...
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...Emerging Road Safety Problems in Urban Areas of Bangladesh Dr. Md. Mazharul Hoque1, S. M. Sohel Mahmud2, Abdus Shakur Qazi2 ABSTRACT: Developing countries like Bangladesh are experiencing very serious road safety problems. Latest studies revealed that there are 10000-12000 deaths from road traffic injuries each year in Bangladesh, nearly 25 percent occurring in the urban areas. Urban road accidents are a very serious and growing problem with vast majority of road accident fatalities comprising vulnerable road users viz. pedestrians, bi-cyclists and motorcyclists. Indeed, in urban areas of Bangladesh pedestrians represent often up to 70 percent of the total road accident fatalities. Their involvement varies between 35 and 62 percent of the road accident fatalities in the medium sized cities. This paper aims to present an overview of the dimensions and characteristics of the road traffic accident problems in Bangladesh, with a special reference to the situation in urban areas, metropolitan cities in particular. The paper also highlights the key safety issues and priority measures for mitigating urban road safety problems in Bangladesh. INTRODUCTION The combination of rapid urbanization and motorization has been a key cause of numerous transport problems in developing cities of Asia. Indeed, the rapid urbanization process, high vehicular population growth and that of the mobility, inadequate transportation facilities and policies, varied traffic mix with over concentration of non-motorized...
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...Problem Statement The current network does not meet the needs of the school. The current network also has a significant impact on production. The network will need to be re-engineered to address the key stake holders concerns. Interviewing the stakeholders resulted in the following areas of concern: 1. The network cannot support multiple users doing the same task. Collisions are occurring on a regular basis and the band is insufficient. 2. No central management for the 50 networked printers and there queues. 3. Current bandwidth is 10 Mbps 4. HVAC technician would like wireless access points 5. The 23 new classrooms are not on the network 6. New wing has slow connections to the mail server 7. The IT Director would like to to integrate VoIP into the current data network 8. Backbone miss-cabled Solution The correction of the limited bandwidth is the first priority. Re-cabling the current network with Category 6 UTP 1000Base F Ethernet cabling because it increases maximum data rate, from 10 Mbps to 1 Gbps. Ethernet will also allow for the use of Carrier Sense Multiple Access with Collision Detection (CSMA/CD) which can be assigned on the workstation NIC. This bandwidth increase will resolve the HVAC Technicians access issue, congestion issues for the classrooms, allows for VoIP integration and provides for future expansion. Replacing the twisted-pair on the backbone with Fiber 1000Based-F will give continued Gigabit throughput and eliminate the remote mail server...
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...magnitudes of the masses for the gliders before the collision were: mass XA1 is equal to 0.107m, and mass XB1 is equal to 0.101m. The magnitudes after the collision of the masses were: mass XA2 equal to 0.0890m, and mass XB2 equal to 0.0820m. The momentum of the masses before collision were: mass PA1 equal to 0.3737 (kg m/s), and mass PB1 equal to 0.3551(kg m/s). The momentum after collision of the masses were: PA2 equal to 0.3109 (kg m/s), and mass PB2 equal to 0.2886 (kg m/s). When considering the direction of the vectors the area of uncertainty is small when considering the area of both parallelograms of uncertainty, because the overlapping of the parallelograms is only a small portion of each. The momentum was partially conserved within the error range of the parallelograms, or the portion where they overlap. Conclusions 1. It is necessary that they glide on a cushion of air, so that they can avoid any friction which would slow down their movement and could possibly keep them from colliding. The friction would differ for each mass, and would change all the predicted values. If the masses were not on an air cushion, it is impossible to predict that the two masses would ever collide because of the differing frictions for each mass. 2.If the masses were doubled, the before and after collision velocities would both decrease by a factor of two. Because the gliders would take double the time to get to the same distance for collision as if they were not doubled.(newton’s law) ...
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...momentm of two carts before and after various types of collisions. Theory: * When objects collide and assuming there are no external forces are acting on the colliding objects, the principle of the conservation of momentum always holds. * For a two-object collision, momentum conservation is stated mathematically by the equation: * PTotali =PTotalf * m1v1i+m2v2i=m1v1f+m2v2f * When working with a complete inelastic collision, the two objects stick together after the collision, and the momentum conservation equation becomes: * PTotali =PTotalf * m1v1i+m2v2i=(m1+m2)vf * During this experiment, photogates will measure the motion of two carts before and after elastic collision. The cart masses can be measured by using a simple mass scale. * Then, total momentum of the two carts before collision will be compared to the total momentum of the two carts after collision. Equipment: 850 Universal | Dynamic Track | Two dynamic carts | Two picket fences | Mounting brackets | Mass Balance | Mass Bar | Two Photogates | Data: Part A – Elastic Collision with approx. equal masses: Trial | V1 i (m/s) | V2 i (m/s) | V1 f (m/s) | V2 f (m/s) | 1 | .310 | 0 | 0 | .287 | 2 | .468 | 0 | 0 | .439 | 3 | .486 | 0 | 0 | .435 | 4 | .274 | 0 | 0 | .254 | 5 | .468 | 0 | 0 | .441 | * m1 = mass of cart 1 = .510 kg * m2 = mass of cart 2 = .529 kg | Part B – Elastic Collision with Unequal Masses: Trial | V1 i (m/s) | V2 i (m/s)...
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...Areas for Consideration – Personnel Case Study 3 Is there a practice policy for sickness absence? If not written down, what is accepted practice? How well has this been communicated to all staff? How is this reinforced? How are the facts re sickness absence recorded? Is the procedure reasonable, fair and consistently adhered to throughout the practice? Are there systems in place for monitoring all absences? Were the assumptions and suspicions about alcohol investigated – any evidence? Assuming investigations and observations re alcohol were confirmed (ie evidence/observation confirmed by staff member turning up drunk, under the influence of alcohol, smelling strongly of alcohol), should this have constituted instant dismissal there and then? Consider what support/counselling/advice you would give any member of staff with personal problems which led to poor performance. Does the receptionist know that the situation now is clearly about discipline and what that involves? Has she acknowledged (1) understanding of why she has been disciplined and (2) receipt of formal final warning? Was a timescale for improvement implicit in previous warnings? Did the practice consider that there may be a genuine social problem underlying the “alcoholism”? If a health/social problem was identified, should the practice have considered giving guidance on access to counselling/support rather than discipline? Should the practice bite the bullet and accept...
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...Group project: Applying OB to a Mythical Small Business Faisal Alkhulaifi, Anwar Alqallaf, Hassan Ahmad, Mohammad Murad, Abdulla Ahmad American University of the Middle East As a group we sit together and we put many choices until we all agree in one specific business and that is opening a garage, and spare part. We choose this business because there are a lot of accidents accrue in Kuwait daily. Kuwait’s streets have become really unsafe due to those few people who feel that they are better than the law and everyone else on the street. According to recent studies by the Traffic Department, Kuwait is moving in to top the record in world traffic deaths. Studies show that there are 75,194 accidents taking place on Kuwaiti roads annually, which is 206 accidents per day on average, or 8.5 per hour. Fatalities have climbed to 493 per year, averaging 1.3 per day. And it was also shown that among the top 20 causes for deaths in Kuwait, traffic accidents rank at No. 8. Kuwaiti roads can only accommodate 700,000 vehicles, while 1.6 million vehicles ply the roads. And to add to the problem, about 80,000 cars enter the roads every year. So we think this is the best idea to do to open a small business in Kuwait. There are a lot of competitors for us in Kuwait, but they are not spread in all over Kuwait. They are only in shwaikh, fahahel, and sharq. And in five years later if we saw that the business is doing well we will open another branches for it. Our idea is that we are going...
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