PHY2053 Physics 1, Test 3 Exam With Answers - 1 The impulse...

____ 1. The impulse experienced by a body is equivalent to its change in:
a. velocity.
b. kinetic energy.
c. momentum.
d. None of the above choices are valid.
____ 2. Alex throws a 0.15-kg rubber ball down onto the floor. The ball's speed just before impact is 6.5 m/s, and just
after is 3.5 m/s. What is the change in the magnitude of the ball's momentum?
____ 3. A crane drops a 0.30 kg steel ball onto a steel plate. The ball's speeds just before impact and after are 4.5 m/s
and 4.2 m/s, respectively. If the ball is in contact with the plate for 0.030 s, what is the magnitude of the
average force that the ball exerts on the plate during impact?