Question

Q1. A perfectly elastic rubber ball falls vertically from rest and rebounds from the floor. Which one of the following velocity-time, v-t, graphs best represents the motion from the moment of release to the top of the first rebound? A B C D Q2. A girl is bouncing on a trampoline. Assuming that air resistance is negligible, her acceleration A is zero when she is at maximum height. B is constant when she is in the air. C changes direction as she rises and then falls. D is maximum just before she lands on the trampoline.

          Q1. A perfectly elastic rubber ball falls vertically from rest and rebounds from the floor. Which one of the following velocity-time, v-t, graphs best represents the motion from the moment of release to the top of the first rebound?

A B C D

Q2. A girl is bouncing on a trampoline. Assuming that air resistance is negligible, her acceleration

A is zero when she is at maximum height.
B is constant when she is in the air.
C changes direction as she rises and then falls.
D is maximum just before she lands on the trampoline.

Q1. A perfectly elastic rubber ball falls vertically from rest and rebounds from the floor. Which one of the following velocity-time, v-t, graphs best represents the motion from the moment of release to the top of the first rebound?

A B C D

Q2. A girl is bouncing on a trampoline. Assuming that air resistance is negligible, her acceleration

A is zero when she is at maximum height.
B is constant when she is in the air.
C changes direction as she rises and then falls.
D is maximum just before she lands on the trampoline.

Added by William M.

Question

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