Multiple Choice 3

Question 1

“The sum of joint forces that the body must absorb when slowing down is equal in
magnitude and oppositely directed to the external forces that slow the body down” is an
interpretation of . . .

Answer 1

Action-Reaction Principle

Question 2

“The sum of joint forces that the body must absorb when slowing down is equal in
magnitude and oppositely directed to the external forces that slow the body down” is an
interpretation of . . .

Answer 2

Action-Reaction Principle

Question 3

Which of the following external forces slow the body down when it contacts the ground
after a jump?

Answer 3

Vertical ground reaction force

Friction Force

Question 4

Based on the “Linear Impulse - Momentum Principle” which of the following describes
“a change in a factor” that would decrease the vertical ground reaction force when
landing after a jump?

Question 5

Thinking Question: A soft foam pit is used for landing after a high jump in track and
field. According to the linear impulse-momentum relationship, the foam pit reduces the
impact force by

Answer 5

slowing down the application time of internal forces slowing the body down

Question 6

Which of the following external forces slow the body down when it contacts the ground
after a jump?

Answer 6

Vertical ground reaction force

Friction Force

Question 7

Based on the “Linear Impulse - Momentum Principle” which of the following describes
“a change in a factor” that would decrease the vertical ground reaction force when
landing after a jump?

Question 8

Thinking Question: A soft foam pit is used for landing after a high jump in track and
field. According to the linear impulse-momentum relationship, the foam pit reduces the
impact force by

Answer 8

slowing down the application time of internal forces slowing the body down