1.The peak horizontal force on average is _______ in running than in walking. In addition, the time over which the horizontal force acts is ______ in running than in walking. a. greater, longer b. less, shorter c. less, longer d. greater, shorter e. none of the above

2. Which of the following statements is false? a. A body will maintain a state of rest or constant velocity along a straight line unless acted on by an external force that changes the state b. A force applied to the body causes an acceleration of that body of a magnitude proportional to the force, in the direction of acceleration, and inversely proportional to the body's mass c. When one body exerts a force on a second, the second body exerts a reaction force that is equal in magnitude and opposite in the direction of the first d. None of the above statements are true e. All are true

3. If the acceleration for the TBCM is 0, then the vertical ground reaction force must be 0. If the vertical ground reaction force is 0, then the acceleration of the TBCM is 0. a. Both are true b. State 1 is true, statement 2 is false c. Statement 1 is false, Statement 2 is True d. Both are false

4. When jumping, which set of forces determine how high (vertical displacement) you jump? I. Medial/lateral forces II. Anterior/Posterior forces III. Vertical Force a. II b. II,III c. III d. I,III e. I,II, III

5. A person who is a heel strike runner has an advantage over a fore foot (flat foot) striker because a. They do not experience the passive ground reaction force spike associated with heel contact and therefore suffer fewer injuries b. They do not stress the Achilles tendon to as great an extent and therefore suffer fewer injuries c. They experience a lower active peak ground reaction force spike and research has related a reduction in muscular, tendinous, and/or ligamentous injuries d. Anterior-posterior force are reduced and therefore heel strike runners suffer fewer injuries e. None of the above

6. Friction acts _______ the direction of motion and _______ to the interface between the objects sliding over one another. a. With, perpendicular b. With, parallel c. In the direction opposite to, parallel d. In the direction opposite to, perpendicular e. None of the above

7. As a therapist you wish to build up your client's ability to handle larger ground reaction forces. During training, things you would do to increase resultant GRF (horizontal and/or vertical force) experience would be a. Progressively increase their gait speed b. Progressively increase the height their body drops as they go down c. Progressively increase their step length d. Provide footwear with less cushion e. All of the above

8. For the following, consider a foot on a tile floor in the shower. Which of the following is false? I. If the foot on the tile applies a force and the foot does not move, then the force due to friction is equal to the horizontal force. II. If the foot on the tile applies a horizontal force and the foot does not move, then the force due to friction is equal to the horizontal force III. A person of the same weight as another, but with bigger feet, has no advantage in terms of their potential not to slip on the tiles as compared to someone with smaller feet IV. A person of the same weight as another, but with bigger feet, has an advantage in terms of their potential not to slip on the tile. a. I, II b. II, III c. I, IV d. II, IV e. All are true

9. Factors associated with an object that influences the magnitude of the fluid resistance include: I. Density II. Viscosity III. Shape a. I, II b. I, III c. II, III d. I, II, III e. None of the above

10. Which of the following statements must be true to decrease horizontal velocity during walking? a. The horizontal velocity is positive and no net horizontal force is applied b. The net horizontal impulse is positive in the direction you are walking c. The net vertical impulse is positive in the direction you are walking d. The sum of the horizontal forces is positive in the direction you are walking e. None of the above

11. At a particular instant in time the horizontal velocity of a person is 7m/s. If the net horizontal impulse applied to the person during that instant was determined to be 5Ns, the magnitude of the horizontal velocity of the person a. Was constant b. Increased c. Decreased d. Was zero e. Insufficient information is provided

12. What factors determine how long a projectile takes to reach its peak? I. Horizontal velocity II. Angle at release III. Vertical velocity IV. Resultant velocity

13. Which of the following is true? a. Angular kinematics examines the cause of angular motion. b. The axis of rotation is parallel to the plane of motion c. If an object has constant angular speed the angular acceleration is 0 . d. Angular motion requires that an object of interest has the same liner displacement e. All are false

14. Which peak can you alter when landing from a jump, passive or active?

15. There are more 2nd class levers in our body than first class levers. True or false?

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