KIN 341 Exam 4

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 1, 2 1, 2, 3 1, 2, 3, 4 1, 2, 4

1,2,4

What should one do to apply maximum pushing force? 1. use the largest possible number of segments 2. use the smallest segments 3. move through a large range of motion 4. move the segments in an ordered sequence, one after the other

1,3

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 1, 3 1, 4 2, 3 2, 4

1,4

What is the effect of joint actions in the propulsive phase of the long jump? 1. action at the ankle moves lower leg backward for balance 2. action at metatarsal-phalangeal joints lifts body upward 3. hip action helps keep trunk in alignment 4. knee action causes thigh to move forward and upward 1, 4 1, 2, 3 2, 3, 4 1, 2, 3, 4

2,3,4

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 1, 2, 5 1, 4, 6 2, 3, 4 4, 5, 6

2,3,4

What are the prime movers at the elbow during the down phase of the pull-up? 1. triceps brachii 2. biceps brachii 3. anconeus 4. brachialis 5. brachioradialis

2,4,5

The maximum backpack weight that should be carried is what percentage of body weight? 20% 30% 40% 50%

20%

Why is it easier to rotate in a tuck position than a pike position? angular displacement is less angular momentum is less angular velocity is greater linear acceleration is greater

Angular velocity is greater

Throw-like motions are classified as being ___ in nature. sequential simultaneous combination concurrent

Sequential

A punch is usually directed horizontally rather than vertically. True False

True

A push, pull, or lift is always applied directly to an object. True False

True

The basic joint actions in pushing and pulling patterns of motion are flexion and extension. True False

True

Which of the following factors has the least effect on the development of momentum in a striking implement? air resistance length of lever mass of the implement speed of application of force

air resistance

Which of the following is the purpose of the arm swing in jumping? accelerate lower extremity downward to increase ground reaction force develop forward momentum transfer forward momentum to body all of the above

all of the above

What determines the path of the center of gravity of the body in a nonsupport activity? the force of projection the angle of the hip joint the height of projection the angle of projection

angle of projection

Which of the following will not act to increase the force available in a pushing or pulling motion? applying all forces in sequence applying all forces along the line of action involving the lower extremity using the body weight when possible

applying all forces in sequence

Where is the potential energy of a pendulum the greatest? at the bottom of the swing at the top of the swing half way up the swing half way down the swing

at the top of the swing

In which direction should the person paddling on the left in the back push the paddle against the water in order to turn the canoe to the left? toward the canoe away from the canoe forward backward

away from the canoe

Which best describes the striking segment when hitting a ball with as high a velocity as possible? be as close to the axis of rotation as possible have a low angular velocity have a low linear velocity be as far from the axis as possible

be as far from axis as possible

About which point does an unsupported body rotate? the center of gravity the center of torque the part of the body last in contact with the surface the point of force application

center of gravity

What muscle action is involved in the movement of the knee joints in the power phase of the standing long jump? concentric contraction of the knee flexors concentric contraction of the knee extensors eccentric contraction of the knee flexors eccentric contraction of the knee extensors

concentric contraction of the knee extensors

Which factor contributes to form drag in swimming and objects moving through the air? displacement total surface area size of object cross sectional area

cross-sectional area

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? reach highest velocity at the same time distal segments reach higher velocity than proximal segments proximal segments reach higher velocity than distal segments segments should move through a large range

distal segments reach higher velocity than proximal segments

In which direction is the force applied during the propulsion phase of the walk? downward down and backward forward forward and upward

downward and backward

What is the joint action in the shoulder girdle and glenohumeral joint in the pull phase of the front crawl stroke? downward rotation and adduction of scapula - extension and inward rotation of humerus downward rotation of scapula - extension and abduction of humerus upward rotation and abduction of scapula - flexion and adduction of humerus upward rotation of scapula - extension and inward rotation of humerus

downward rotation and adduction of scapula - extension and inward rotation of humerus

Which would be the most efficient manner in which to lift a heavy box? grasp box at arms length face box with elbows bent and arms close to body turn side to box and lift with one arm place one hand under box and one hand on top at arms length

face box with elbows bent and arms close to body

When lifting, the farther the load is from the joints performing the lift, the lesser the resistance arm True False

false

Which pattern of joint motion most clearly typifies push-pull patterns? flexion-extension abduction-adduction inward-outward rotation a series of rotations

flexion-extension

Which of the following is responsible for movement in a pendulum? the force of gravity momentum reaction forces centripetal and centrifugal forces

force of gravity

What actions are primarily responsible for the push off in the support phase in walking? flexion of the knee and plantar flexion of the ankle slight plantar flexion of the ankle and flexion of the metatarsal-phalangeal joints forceful extension of the hip, knee, and ankle joints strong extension of the hip and knee joints

forceful extension of the hip, knee, and ankle joints

In which part of the walking cycle are the largest forces exerted against the ground? swing phase balance to unbalance heel strike propulsive phase

heel strike

In a long jump, the center of gravity should be ___ the base of support. horizontally far from in front of directly over close to

in front of

How can the long jumper stay in the air longer? increase velocity, decrease angle decrease velocity, increase angle increase vertical velocity, decrease angle maintain velocity, increase angle

increase angle and maintaining velocity

How may the height of the swing of a pendulum be increased? increase radius on downswing, decrease on upswing increase radius on downswing, increase on upswing decrease radius on downswing, decrease on upswing decrease radius on downswing, increase on upswing

increase the radius on the downswing, decrease on upswing

What happens to drag on the body as velocity increases? increases decreases stays the same not enough information

increases

What makes it difficult for a runner to change either speed or direction? torque acceleration inertia velocity

inertia

Which are the two forces that are primarily responsible for propulsion in swimming? drag and reaction forces lift and buoyancy drag and lift forces reaction forces and buoyancy

lift and drag

Although an object in motion has no weight in a weightless environment, which of the following does it still possess? mass momentum both a & b none of the above

mass and momentum

What is the movement in the shoulder (glenohumeral) joint in the delivery and beginning of the follow through of an overarm throw? abduction, flexion, medial rotation horizontal adduction, abduction medial rotation, horizontal adduction lateral rotation, flexion

medial rotation, horizontal adduction

Which of the following should be avoided in working with long handled implements? lifting pulling pushing twisting

twisting

Why is it easier for a runner to move the recovery leg forward more rapidly when it is flexed than when extended? mass of the leg is greater when it is flexed mass of the leg is less when it is flexed c. moment of inertia of the leg is greater when leg is flexed moment of inertia of the leg is less when leg is flexed

moment of inertia of the leg is less when leg is flexed

Why would a coach recommend a "tighter" tuck to enable the gymnast to get all the way around? angular velocity will decrease angular displacement will decrease moment of inertia will decrease mass will decrease

moment of inertia will decrease

Which is an example of the continuous application of a simultaneous pattern? a volleyball set landing from a jump pushing a lawn mower putting a shot

pushing a lawn mower

Why lift a heavy weight by flexing and then extending the knees rather than flexing at the hips and then lifting the trunk? longer lever less force available shorter resistance arm smaller angle of pull

shorter resistance arm

What is the function of the quadriceps muscles when the heel contacts the ground in walking? extend the lower leg at the knee joint flex the lower leg at the knee joint flex the thigh at the femoral joint stabilize the knee against the reaction force from the floor

stabilize the knee against the reaction force from the floor

How does the relationship between stride length and stride rate change when going from a walk to a run? stride length increases, stride rate decreases stride length decreases. stride rate increases stride length increases, stride rate increases stride length decreases, stride rate decreases

stride length increases, stride rate increases

All other factors being equal, which of the following factors govern the speed attained in any swimming stroke? force and distance stroke length and stroke frequency stroke frequency and stroke force stroke force and stroke length

stroke length and stroke frequency

Which of the following does not illustrate an underarm throwing pattern? softball pitch golf swing tennis drive bowling delivery

tennis drive

Which muscles produce the first part of the forward swing of the lower extremity in walking? iliopsoas, tensor fascia latae, gracilis, rectus femoris rectus femoris, hamstrings, iliopsoas, adductor longus tensor fascia latae, gluteus maximus, adductors longus and brevis tensor fascia latae, sartorius, pectineus, iliopsoas

tensor fascia latae, sartorius, pectineus, iliopsoas

Which portion of the front crawl stroke contributes the most to stroke velocity? kick arm recovery arm pull action of the feet

the arm pull

How does the ice skater push off against the ice, given the very low coefficient of friction between the blade and the ice? the blade is turned perpendicular to the direction of glide and digs into the ice the blade is turned parallel to the direction of glide and digs into the ice the ice skater relies on momentum generated from decreasing stability the ice skater must rely on ground reaction force from another surface

the blade is turned perpendicular to the direction of glide and digs into the ice

Which segment should be the last to move and have the highest velocity in a throw? hand forearm upper arm trunk

the hand

Which is the point of rotation in rotary locomotion of the body? the center of gravity the center of torque the part of the body in contact with the surface the point of force application

the part of the body in contact with the surface

What determines the terminal velocity of a body in free fall? the surface area presented to the airflow the speed of the fall the position of the body in the air the wind velocity

the surface area presented to the airflow

Which lever class is demonstrated by the thighs in the flutter kick (down phase) during the front crawl? 1st class 2nd class 3rd class a force couple

third class

How might a diver or gymnast initiate a twist about the vertical axis once airborne and rotating forward about the horizontal axis? turn the head away from the rotating direction tilt the body by raising the arm in the direction of the twist tilt the body by raising the arm opposite the twisting side the twist must be started before take off

tilt the body by raising the arm in the direction of the twist

Which of the following is the prime mover in elbow extension during the up phase of the pushup? biceps brachii pectoralis major triceps brachii brachialis

triceps brachii

In which direction will the body move if hands press down and back against the water in a sculling motion? down and back down and forward up and back up and forward

up and forward

Which of the following is not true when trying to produce a motion for maximum accuracy? use the fewest number of segments use the smallest segments possible use maximum possible contact time use the highest possible velocity

use the highest possible velocity