Question 1

Why is it difficult to throw a ball while treading water (as in water polo)?

Accepted Answer

hard to generate reaction force with legs

Question 2

Which best describes the striking segment when hitting a ball with as high a velocity as possible?

Accepted Answer

A)  be as close to the axis of rotation as possible 
B)  have a low angular velocity 
C)  have a low linear velocity 
D)  be as far from the axis as possible D

Question 3

Why is it better to contact the ball with the elbow fully extended rather than flexed in executing a hard tennis serve?

Accepted Answer

increased radius, so increased linear velocity

Question 4

Which of the following muscles will contract to produce the trunk rotation to the left that is necessary for a right hand throw?
1) right external oblique
2) left external oblique
3) right internal oblique
4) left internal oblique

Accepted Answer

A)  1, 3 
B)  1, 4 
C)  2, 3 
D)  2, 4

Question 5

Which of the following factors has the least effect on the development of momentum in a striking implement?

Accepted Answer

A)  air resistance 
B)  length of lever 
C)  mass of the implement 
D)  speed of application of force

Question 6

The wind-up (preparatory phase) is a very important part of the forceful throwing motion. Give a neuromuscular reason and at least one mechanical reason why this is true.

Accepted Answer

The answer of The wind-up (preparatory phase) is a very...

Question 7

What is the movement in the shoulder (glenohumeral) joint in the delivery and beginning of the follow through of an overarm throw?

Accepted Answer

A)  abduction, flexion, medial rotation 
B)  horizontal adduction, abduction 
C)  medial rotation, horizontal adduction 
D)  lateral rotation, flexion

Question 8

Which muscles are responsible for the primary action of the humerus in the shoulder joint motion during the propulsive phase of the overarm throw?
1) anterior deltoid
2) subscapularis
3) latissimus dorsi
4) pectoralis major
5) posterior deltoid
6) teres major

Accepted Answer

A)  1, 2, 5 
B)  1, 4, 6 
C)  2, 3, 4 
D)  4, 5, 6

Question 9

Throw-like motions are classified as being ____ in nature.

Accepted Answer

A)  sequential 
B)  simultaneous 
C)  combination 
D)  concurrent

Question 10

Why should the pelvic girdle rotate before the arm comes through in executing a hard throw?

Accepted Answer

The answer of Why should the pelvic girdle rotate before...

Question 11

What are the prime movers in giving top spin to the ball in a tennis stroke with strong forearm pronation?
1) pronation teres
2) pronator quadratus
3) biceps brachii
4) brachialis

Accepted Answer

A)  1, 2 
B)  1, 2, 3 
C)  1, 2, 3, 4 
D)  1, 2, 4
Short Answer Questions

Question 12

Which of the following does not illustrate an underarm throwing pattern?

Accepted Answer

A)  softball pitch 
B)  golf swing 
C)  tennis drive 
D)  bowling delivery

Question 13

Why can you generate a better throw if you move each of the body parts involved in sequence rather than simultaneously?

Accepted Answer

The answer of Why can you generate a better throw...

Question 14

Which of the following best describes the desired action of the segments contributing to the motion in striking activities where maximum velocity of the implement is desired?

Accepted Answer

A)  reach highest velocity at the same time 
B)  distal segments reach higher velocity than proximal segments 
C)  proximal segments reach higher velocity than distal segments 
D)  segments should move through a large range

Question 15

Which segment should be the last to move and have the highest velocity in a throw?

Accepted Answer

A)  hand 
B)  forearm 
C)  upper arm 
D)  trunk

Exam 18: Locomotion: Solid Surface