...= 50 ms-1, Force constant c = 0.05 The force constant is given by F = cv2 = 0.05 × 2500 = 125 N. Question 2: An object is traveling at 20 ms-1 experiences a force of 50 N. Calculate the force constant. Solution: Given: Velocity of air v = 20 ms-1, Force F = 50 N, The force constant is given by c = F/v² = 50/20² = 0.125 http://formulas.tutorvista.com/physics/air-resistance-formula.html#air-resistance-problems http://physics.tutorvista.com/motion/projectile-motion.html • PhysicsMotionProjectile Motion Top Projectile Motion The motion of object in two dimensions is explained by two main principles that are kinematic principles and Newton's laws of motion. The motion in two dimensions is called the motion of projectiles. The projectile object is one on which is moved under the force of gravity. Some examples of projectiles are like an object is dropped from its rest condition on which there...
Words: 2390 - Pages: 10
...Passive and Assistive Range of Motion Exercises Range of Motion Exercises Range of motion (ROM) exercises are done to preserve flexibility and mobility of the joints on which they are performed. These exercises reduce stiffness and will prevent or at least slow down the freezing of your joints as the disease progresses and you move less often. Range of motion is the term that is used to describe the amount of movement you have at each joint. Every joint in the body has a "normal" range of motion. Joints maintain their normal range of motion by being moved. It is therefore very important to move all your joints every day. Stiff joints can cause pain and can make it hard for you to do your normal daily activities. Each person with ALS needs a program of exercise tailored to his or her individual needs and abilities. With a prescription your doctor can either send you to an outpatient clinic to see a Physical Therapist or have one come to your home to help you design a personalized exercise program. The therapist will see you until you or your caregiver are independent with a home exercise program that you can follow through with daily. It is important to remember that as the disease progresses, the type of ROM exercises you will need will change. It is important to be proactive when this occurs and ask your doctor to write you another prescription to see a therapist so your home exercise program can be modified. There are different kinds of ROM exercises. There are stretching...
Words: 1963 - Pages: 8
...It is made up of the clavicle, humerus, and scapula. Some of the muscles that assist in holding the joint in place are the rotator cuff muscles; which include the supraspinatus, infraspinatus, subscapularis, and teres minor. The normal phenomena based on the theories of anatomy and kinesiology includes normal range of motion and muscle strength. Normal range of motion for the shoulder joint would be to have 180 degrees range of motion for flexion and shoulder extension between 45-60 degrees (Radomski & Trombly, 2008). The muscles that will be involved in flexion and extension will be the deltoid, pectoralis major, latissimus dorsi, teres major, coracobrachialis, triceps brachii, and the biceps...
Words: 1207 - Pages: 5
...Case Problem 2: Motion Picture Industry This case provides the opportunity to use numerical methods to continue the analysis of the motion picture industry data from chapter 2. Using descriptive statistics such as the mean, median, standard deviation and range. Five-number summaries and identification of outliers are also used. Descriptive Statistics Variable | N | Mean | Median | Standard Deviation | Range | Opening Gross | 100 | 9.37 | 0.39 | 18.8747021 | 108.43 | Total Gross | 100 | 33.04 | 5.85 | 63.1646927 | 380.15 | Number of Theaters | 100 | 1278 | 410 | 1378.68944 | 3905 | Weeks in Top 60 | 100 | 8.68 | 7 | 6.8 | 26 | | | | | | | Variable | Minimum | Q1 | Median | Q3 | Maximum | Opening Gross | 0.01 | 0.06375 | 0.39 | 12.43025 | 108.44 | Total Gross | 0.03 | 0.04275 | 5.85 | 47.43475 | 380.18 | Number of Theaters | 0.03 | 45.75 | 410 | 2626.5 | 3910 | Weeks in Top 60 | 5 | 3 | 7 | 13 | 27 | Interpretation Opening Gross Sales The mean opening gross sales is $9.37 million. The five-number summery is .01, .0637, .039, 12.43 and 108.44. This data shows that the opening gross sales is extremely variable and ranges from $10,000 to $108.44 million. 50% of the motion pictures had an opening gross sales of less then $395,000 or less. The top 25% of the motion pictures had opening gross sales of $12.49 million or more. Total Gross Sales The mean total gross sales are $33.04 million. The five-number summary is .03, .04275, 5...
Words: 848 - Pages: 4
...acceleration due to gravity to check if it is 9.8ms-2. We use the acceleration formula a=V2-V1t2-t1 to calculate the acceleration. Hypothesis: The acceleration due to gravity on the earth is 9.8ms -2. So in this lab, the acceleration in the result should also be 9.8ms-2 since the object experiences the free fall on the earth. Diagram: Free fall object diagram Free fall object diagram Motion detector Motion detector 1 meter 1 meter Point 2(V2 T2) Point 2(V2 T2) Point 1(V1 T1) Point 1(V1 T1) Free fall object Free fall object Method: In this lab, we used a motion detector to measure the velocities and times of the falling object. The range of the motion detector is one meter, so we have to drop the object from one meter above the ground. So to make the result more accurate, first we placed the motion detector on the top of the metal ring which is approximately one meter above the ground. After that we held the object under the motion detector. Then we started the motion detector and dropped the object at the same time. At last we observed the data in the computer provided by the motion detector. We chose two points which the falling object experienced from the data. The points were far from each other. Then we copied the velocity and time of each point separately and wrote them down in table. At last we use the formula a=V2-V1t2-t1 to calculate the acceleration due to gravity. We repeated these steps three times. Results: | Run 1 | Run 2 | Run 3 | | Point...
Words: 1204 - Pages: 5
...deliver medications subcutaneously in conjunction with other procedures” (Pensavalle n.d.). The modality the physical therapist chose to use was called an ultrasound. “Ultrasound uses high-frequency acoustic (sound) waves, rather than electromagnetic energy, to elicit thermal and nonthermal effects in deep tissue to depths of 3 cm or more” (Prentice 2011, p.364). The physical therapist uses this modality to start him with so that he may be more relaxed and comfortable when performing his exercises. When his time was over for the ultrasound, she had him pedal on the arm bike for 6 minutes. Once he finished that exercise, she showed him a stability exercise. He had to roll the ball on the wall with his hand flat on the ball making a circular motion doing 3 sets with 10 reps. He performed shoulder internal and external rotation with a rubber band doing 2 sets with 10 reps. His next exercise was the shoulder side lying external rotation with a 5 pound weight doing 3 sets of 10. The last exercises he did for the afternoon was the shoulder serratus punch with a 5 pound dumbbell performing 2 sets of 10 reps. When finished with all his exercises he...
Words: 1846 - Pages: 8
...what the descriptive statistics tell us about the motion picture industry. When comparing the motion picture industry for their opening gross there are several central tendency measurements. The mean is 9.37, median is .3935, and mode is .03. We are comparing 100 different movies. The range of opening gross is 108.43, which is from .01 to 108.44. The standard deviation or SD is 18.87. The middle 50% of the values was skewed. This was determined by using the appropriate measure of variability. The interquartile range for opening gross is 12.37. Opening Gross Histogram: When comparing the motion picture industry for their total gross there are several central tendency measurements. The mean is 33.0384, median is 5.852, and mode is .03, .04, .05, .11, .13, .42, and 56.07 (these all appear twice, therefore they are all equal). We are still comparing 100 different movies. The range for the total gross is 380.15, which is from .03 to 380.18. The standard deviation or SD is 63.16. The median total gross was 5.85; 50% of the total gross values were less than 5.85, 50% were above 5.85. The skewness of total gross is 3.28. The kurtosis of total gross was 12.32. The interquartile range for total gross is 47.03. Total Gross Histogram: When comparing the motion picture industry for the number of theaters there are several central tendency measurements. The mean is 1,277.94, median is 410, and mode is 15 and 202. The range for the total gross is 3,905, which is from 5 to 3...
Words: 925 - Pages: 4
...of 20.5, 8.3 average years of training and 36.9 average hours of training per month. The BMI was determined by the formula of the player’s body mass divided by the square of his body height. (Wong, et, al. 2014 p. 22) In order to find the body and racket kinematics of the serves, the movements were recorded by an 8-camera motion analysis system. The ball speed was measured by a radar speed gun in kilometers per hour that was placed on the baseline of the tennis court. To find the kinematics themselves, 43 “retro-reflective” markers were placed on the participant and the racket to measure body kinematics and the moment of ball to racket...
Words: 1203 - Pages: 5
...Quantitative Business Analysis The following is the descriptive statistics for the Motion Picture Industry Case study. The data set provided was used to calculate the median, mean and mode for the gross opening weekend. On the first graph you can see that for the opening gross the graph is skewed to the right so the median is the best central tendency measure rather than using the mean. The median opening gross was 0.39, which means 50% of the opening gross values were less than 0.39 and 50% were above 0.39. The opening gross was 3.43, which indicates a right tail. The kurtosis of the opening gross was 13.81, which indicates a leptokurtic distribution. This skew can be seen on the first histogram. The graphs are attached on the excel file as well. The opening gross range was 108.43, from 0.01 to 108.44. The standard deviation of opening gross was 18.87. The Interquartile Range, which calculates the range for the middle 50% of the values, is used to measure the variability. The Interquartile Range for the opening gross was 12.37. The opening gross outliers were calculated on the box-plot and the extreme values were 108.44 which was Star Wars Episode 2, 102.69 Harry Potter and the Goblet of Fire, 77.06 war of the Worlds, 50.34 Mr. and Mrs. Smith, 48.75 Batman Begins, and 33.90 Wedding Crashers, The values are less than z-score of -3 or larger than z-score of +3 which is why they are considered outliers. War of the Worlds at 77.06, Harry Potter and the Goblet of Fire...
Words: 940 - Pages: 4
...The skewness of opening gross was 3.43 indicating a right tail. The range of opening gross ranged from 0.01 to 108.44. The standard deviation of opening gross was 18.87. The interquartile range for opening gross was 12.37. Based on the opening gross the extreme values were 108.44, 102.69, 77.06, 50.34, 48.75 and 33.90. The values that are less than z-score of -3 or larger than z-score of +3 should be considered outliers. Therefore with that criteria 77.06, 102.69 and 108.44 are considered the outliers. The range of total gross was from 0.03 to 380.18. The standard deviation of total gross was 63.16. The interquartile range for total gross was 47.03. Based on the total gross the extreme values were 380.18, 287.18, 234.21, 209.22, 205.28, and 186.22. The values are less than z-score of -3 or larger than z-score of +3 should be considered outliers. Therefore with that criteria 380.18, 287.18, and 234.21 are once again considered outliers. The tendency measures are calculated for the number of theaters has a right tail so median would be a much more appropriate central tendency measure than the mean. The median was 410; 50% of values on the number of theaters were less than 410, 50% were above 410. The skewness of the number of theaters was 0.56 indicating a right tail. The range of the number of theaters was from 5 to 3910. The standard deviation of the number of theaters was 1378.69. The interquartile range for the number of theaters was 2580.75. The weeks in top 60 has a right...
Words: 554 - Pages: 3
...(strength: 10^38) (Range: less than 10^-15) -Force that holds protons and neutrons together in a nucleus of an atom Electromagnetic (strength: 10^36) (Range: infinity) -Force caused by electric charges Weak nuclear (strength: 10^25) (Range: less than 10^-18) -force responsible for interactions involving elementary particles such as protons and neutrons Gravitational (strength: 1) (Range: infinity) -force of attraction between all objects *All of them have an effect of attraction and repulsion except for gravitational which only has an effect of attraction. Other Forces Normal Force: force perpendicular to the surfaces of the objects in contact Friction: force between objects in contact and parallel to contact surfaces Tension: force exerted by string, ropes, fibers and cables *Friction is opposite of applied force, tension is on the same side as friction *gravity and normal force are opposite except on a hill Symbols Fg force of gravity FN normal force Ff friction FT tension FA appiled Dynamics: study of the causes of motion First law of motion/Law of Inertia If the net force acting on an object is zero, the object will maintain its state of rest or constant velocity -objects at rest remain at rest - objects in motion tend to remain in motion -if velocity of an object is constant, the net external force acting on it will also be zero *icy highway example Second law of motion If the net external...
Words: 772 - Pages: 4
...DOI: 7/24/2015. Patient is a 73-year-old male employee who sustained injuries to his head, neck, back, bilateral shoulders, bilateral hips and left knee when he slipped down the stairs while cleaning the floor. He is status post left knee arthroscopic partial medial and lateral meniscectomy with tricompartmental synovectomy, chondroplasty and lysis of adhesions on 03/28/16. Based on the medical report dated 04/07/16 by Dr. Dassa, the patient presents status post left knee surgery on 03/28/16. The patient states he is utilizing his pain medication and did complete his antibiotics and does experience pain in his left knee. On examination of the left knee, there is swelling. There is tenderness over the surgical portals. Range of motion is decreased...
Words: 501 - Pages: 3
...Assignment Week 2 Due: 11:59pm on Sunday, January 18, 2015 You will receive no credit for items you complete after the assignment is due. Grading Policy A message from your instructor... The next seven problems are for practice. Item 1 Learning Goal: To understand that adding vectors by using geometry and by using components gives the same result, and that manipulating vectors with components is much easier. Vectors may be manipulated either geometrically or using components. In this problem we consider the addition of two vectors using both of these two methods. The vectors and have lengths and , respectively, and makes an angle from the direction of . ⃗ ⃗ ⃗ ⃗ Vector addition using geometry Vector addition using geometry is accomplished by putting the tail of one vector (in this case ) on the tip of the other ( ) and using the laws of plane geometry to find ⃗ ⃗ ⃗ ⃗ : , √ 1. ⃗ the length , and angle , of the resultant (or sum) vector, 2. Vector addition using components Vector addition using components requires the choice of a coordinate system. In this problem, the x axis is chosen along the direction of . Then the x and y ⃗ components of are and respectively. This means that the x and y components of are given by ⃗ 3. 4. , . Part A Which of the following sets of conditions, if true, would show that the expressions 1 and 2 above define the same vector as expressions 3 and 4...
Words: 8307 - Pages: 34
...lengthen muscle and connective tissue (Stone, Kinser, O'Bryant, O'Bryant, Ayers, & William, 2006). The primary reason for stretching before physical activity is to reduce the risk of injury. Stretching helps this as it lengthens the muscles and tendons, therefore increasing range of movement. (Manoel, Harris-Love, Danoff, & Miller, 2008). There are three main types of stretches they are as follows: Static, Dynamic and lastly Proprioceptive Neuromuscular Facilitation (PNF). Static stretching involves stretching a muscle group slowly to the point of tension or minor discomfort for 15 to 30 seconds, and should be performed 2-4 times (Manoel, Harris-Love, Danoff, & Miller, 2008). Dynamic stretching is performed using a controlled bounce or swinging motion to progress a body part to the threshold of its range of movement (ROM). The swinging motion and bounce should always remain controlled throughout the movement and should be gradually increased thus increasing ROM, this should be performed for10 minutes (Kravitz, 2009). The PNF stretch usually requires two people. The target limb is moved through its range of motion passively by a training partner after attaining the final point of the range of motion, the muscle is contracted isometrically against the partner for 3-15 seconds with a contraction force of 20%-70% of the target muscle (Manoel, Harris-Love, Danoff, & Miller, 2008). Traditionally static stretches were thought to be the best type of stretches prior to working...
Words: 724 - Pages: 3
...Descriptive statistics: Opening Gross: Several central tendency measures (i.e., mean, median, and mode) are calculated for opening gross in the Excel file. As can be seen in the below histogram, opening gross has a right tail (i.e., skewed to the right), so median would be a more appropriate central tendency measure than the mean. The median opening gross was 0.39; 50% of the opening gross values were less than 0.39, 50% were above 0.39. The skewness of opening gross was 3.43 indicating a right tail. The kurtosis of opening gross was 13.81 indicating a leptokurtic distribution. The range of opening gross was 108.43, from 0.01 to 108.44. The standard deviation of opening gross was 18.87. However, because the distribution was skewed, interquartile range (IQR), which is the range for the middle 50% of the values, would be a more appropriate measure of variability. The interquartile range for opening gross was 12.37. Opening Gross Outliers: Based on the box-plot, extreme values were 108.44 (Star Wars: Episode II), 102.69 (Harry Potter and the Goblet of Fire), 77.06 (War of the Worlds), 50.34 (Mr. and Mrs. Smith), 48.75 (Batman Begins), and 33.90 (Wedding Crashers). It is also suggested that values that are less than z-score of -3 or larger than z-score of +3 should be considered outliers. Using that criteria 77.06 (War of the Worlds), 102.69 (Harry Potter and the Goblet of Fire), and 108.44 (Star Wars: Episode II) can be considered outliers. Total Gross: Several central tendency...
Words: 1184 - Pages: 5
