CHAPTER 10: LINEAR KINEMATICS OF HUMAN MOVEMENT
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1 CHAPTER 10: LINEAR KINEMATICS OF HUMAN MOVEMENT 1. Vector mechanics apply to which of the following? A. displacement B. velocity C. speed D. both displacement and velocity 2. If velocity is constant, then acceleration is what? A. zero B. constant, but not necessarily zero C. changing 3. The Greek letter (delta) is used to represent what? A. time C. distance D. change in 4. Linear distance traveled per unit of time describes what? A. displacement B. velocity C. acceleration D. speed 5. Which of the following is not a kinematic quantity? C. acceleration D. force 6. In sport, which measure is more important or relevant? C. depends on the situation D. none of the choiecs are important 7. Which of the following is/are scalar quantity(ies)? B. speed C. displacement D. both distance and speed
2 8. A runner completes 1 full lap around a 400 meter track. What is her displacement? A. 400 meters B. 400 meters X 2π C. zero 9. A runner moving at a velocity of 6 m/s increases the velocity in a 2 s time interval to a rate of 10 m/s. What is the rate of acceleration? A. 4 m/s 2 B. 4 m/s C. 2 m/s 2 D. - 2 m/s When final velocity is larger than initial velocity, the acceleration is what? A. zero B. negative C. positive D. average 11. Marion Jones changes her velocity from 8 m/s to 11 m/s. Gail Devers changes hers from 7 m/s to 10 m/s. Who has the higher acceleration? A. Marion B. Gail C. acceleration equal for both 12. In a 5K road race, the finish line is also the starting line. What does 5K represent? C. speed D. velocity 13. What factor(s) distinguishes elite sprinters from non-elite performers? A. stride length B. stride frequency C. both stride length and frequency 14. Once a projectile is airborne, it is affected by which of the following? A. gravity B. air resistance C. release velocity D. both gravity and air resistance
3 15. It takes a swimmer 1/2 hour to cross a lake that is 1/2 mile wide. What is true of the swimmer's acceleration? A. it is 1/2 mi/hr B. it is 1 mi/hr C. it is equal to velocity squared D. it cannot be determined from the information given 16. If the velocity of a sailboat changes from 4 m/s to 2 m/s over a period of time, what is true of the sailboat's acceleration? A. it is positive B. it is negative C. it is equal to zero D. it is equal to 2 knots/hr 17. A ball rolling across a field with an acceleration of -0.5 m/s 2 rolls 12.5 m and then comes to a stop after 8 seconds. What was the ball's initial speed? A. 4 m/s B. 16 m/s C m/s D m/s 18. Which of the following is an example of projectile motion? A. a badminton shuttlecock during flight B. a long jumper while in the air C. both a badminton shuttlecock during flight and a long jumper while in the air D. none of the choices are examples of projectile motion 19. Which of the following affects the time that a horizontally projected object remains in the air? A. weight B. mass C. projection height D. all of the choices affect the time that a horizontally projected object remains in the air 20. Which of the following statements is true regarding objects projected from the same level as they land? A. time up and time down are equal B. angle of decent is equal to angle of takeoff C. both statements are true D. neither of the statements is true
4 21. What is the average velocity of a cyclist who covers 5 miles in 30 minutes? A. 5 mi/hr B. 10 mi/hr C. 30 mi/hr D. 60 mi./hr 22. When a long jump performance is analyzed, which of the following is likely to be of the most interest? A. the average velocity of the jumper during the run-up B. the instantaneous velocity of the jumper at takeoff C. the average velocity of the jumper during the flight D. the instantaneous velocity of the jumper at landing 23. Which of the following factors typically exerts the most influence on the horizontal displacement obtained by a projectile? A. projection angle B. relative height of projection C. initial speed of projection D. initial acceleration of projection 24. A ball is tossed vertically upward from a height of 2 m with an initial velocity of 10 m/s. Just before the ball hits the ground, its velocity will be what? A. 10 m/s B. less than 10 m/s C. greater than 10 m/s D. not possible to predict 25. A ball is kicked with an initial velocity of 10 m/s at an angle of 30. Neglecting air resistance, what is the speed of the ball at landing? A. 10 m/s B. 10 m/s multiplied by the sine of 30 degrees C. 10 m/s multiplied by the cosine of 30 degrees 26. Which of the following is/are used to indicate direction of displacement? A. right B. negative C. North D. Only right and negative E. all of the choices are used to indicate direction of displacement
5 27. The meter is the unit of measurement for which of the following? C. speed D. only distance and displacement 28. What factor(s) distinguishes elite cross-country skiers from non-elite performers? A. stride or cycle length B. stride or cycle frequency C. both stride or cycle length and frequency 29. Why does running downhill tend to increase running speed? A. increased stride length B. increased stride frequency C. both increased stride length and frequency 30. What quantity is calculated as the inverse of speed? A. velocity B. acceleration C. pace 31. The negative sign in front of the acceleration due to gravity (-9.81 m/s 2 ) can mean which of the following? A. the projectile is traveling down and speeding up (negative direction) B. the projectile is traveling up and slowing down (negative acceleration) C. the projective is both traveling down and speeding up and traveling up and slowing down D. none of the of the choices are correct 32. Which of the following components of projectile is affected by gravity? A. vertical component B. horizontal component C. both a vertical and a horizontal compnent D. depends on the individual situation
6 33. Which of the following is/are true regarding the apex in the trajectory of a projectile? A. it is the highest point in the flight B. vertical velocity is 0 C. direction changes D. it is both the highest pointing the flight and the vertical velocity is Neglecting the effect of air resistance, which of the following is/are true regarding the horizontal component of projectile velocity? A. remains constant throughout flight B. changes according to gravitational acceleration C. equal to 0 D. it both remains constant throughout the flight and changes according to gravitational acceleration 35. The shape of a projectile s trajectory is influenced by which of the following? A. angle of projection B. air resistance C. speed of projection D. both the angle of projection and air resistance 36. Why do elite long jumpers have take-off angles far less than the optimal 45? A. take-off velocity is higher during lower take-off angles B. relative take-off height is zero C. both the take-off velocity is higher during lower take-off angles and the relative take-off height is zero 37. Which of the following represents vertical acceleration of a projectile? A m/s 2 B m/s C. 0 m/s 2 D. 0 m/s 38. Which of the following represents horizontal acceleration of a projectile? A m/s 2 B m/s C. 0 m/s 2 D. 0 m/s
7 39. The laws of constant acceleration can be applied to which of the following? A. horizontal component of projectile motion B. vertical component of projectile motion C. resultant of projectile motion D. both the horizontal and vertical component of projectile motion 40. In the formula v 2 = v 1, what is known about acceleration? A. acceleration = 9.81 m/s 2 B. acceleration = 0 C. both A and B
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