True/False
Indicate whether the sentence or
statement is true or false.
1.
The difference between walking and running is the period of nonsupport.
2.
The kick up during the running recovery phase is a running fault.
3.
The height to which the knee is lifted depends upon the running speed.
4.
Over striding is characterized by the foot contacting the ground in front of the center of
gravity.
5.
The speed of running is dependent upon stride length and stride frequency.
6.
Initial force is an essential consideration in jumping performance.
7.
An angle of projection of 45 degrees will provide the greatest amount of time in the air
because all available force is in a direction to resist gravity.
8.
Any movement in the airborne phase of a jump will create an equal and opposite movement.
9.
The length of the back swing has no effect on throwing velocity.
10.
A ball thrown with top spin will have a longer period of flight than a ball thrown with back
spin.
11.
A firm wrist will contribute to greater striking impact.
12.
The lighter the object being struck the greater the resultant velocity.
13.
The number of muscles contracted has no effect on the force of impact in striking.
14.
Body lean is related to the rate of acceleration of a runner.
15.
The amount of bend in the arms decreases as the running speed decreases.
16.
In running and jumping, explosive leg strength is needed to produce large forces in a short
period of time.
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the
question.
17.
Which of the following concepts would explain why it is easier to maintain balance during a
headstand than during a handstand?
|
A.
|
the height of the center of gravity is lower in the
headstand than in the handstand
|
|
B.
|
the line of gravity is over the base of support in the
headstand, and outside the base of support in the handstand
|
|
C.
|
the length of the moment arm is
longer in the headstand than in the handstand
|
|
D.
|
the magnitude and direction of force are greater in the
headstand than in the handstand
|
|
E.
|
the frictional forces are greater in the headstand than
in the handstand
|
18.
For more balance to exist, the center of gravity must be
|
A.
|
between the object and the line of
direction
|
|
B.
|
outside the base of support
|
|
C.
|
over the base of support
|
|
D.
|
all of the answers are correct
|
19.
Balance is directly proportional to the
|
A.
|
area of the base of support
|
|
B.
|
area of the force application
|
|
C.
|
area of the acceleration
application
|
|
D.
|
area of the momentum
|
|
E.
|
all of the answers are correct
|
20.
Velocity of an object after impact can be increased by
|
A.
|
increasing the mass of the
striking implement
|
|
B.
|
increasing the mass of the object
|
|
C.
|
increasing the initial velocity of the object
|
|
D.
|
all of the above
|
|
E.
|
A and C only
|
21.
When the angle of push or pull is less than 90 degrees
|
A.
|
the total force moves the object
|
|
B.
|
part of the force moves the object
|
|
C.
|
part of the force is wasted
|
|
D.
|
all of the above
|
|
E.
|
B and C above
|
 |
22.
Friction is
|
A.
|
force opposing motion
|
|
B.
|
necessary for movement
|
|
C.
|
necessary to invoke ground reaction forces
|
|
D.
|
all of the above
|
|
E.
|
B and C above
|
23.
Swinging the arm upward with a positive acceleration will cause the ground reaction
force to
|
A.
|
decrease and lift the body from the ground
|
|
B.
|
increase and lift the body from the ground
|
|
C.
|
decrease without affecting body movement
|
|
D.
|
increase without affecting body movement
|
24.
The force of impact may be decreased by
|
A.
|
increasing the distance over which the force is applied
|
|
B.
|
decreasing the surface area over which the force is
applied
|
|
C.
|
increasing the hardness of the object
|
|
D.
|
all of the above
|
|
E.
|
A and B above
|
25.
When the foot strikes the ground ahead of the body, as in walking, the reaction force is;
|
A.
|
backward and retarding forward
movement
|
|
B.
|
forward and retarding forward movement
|
|
C.
|
downward and retarding forward movement
|
|
D.
|
upward and retarding forward movement
|
26.
The characteristic that distinguishes walking from other forms of locomotion is
|
A.
|
the swinging of the leg forward
and backward
|
|
B. |