🤓 Based on our data, we think this question is relevant for Professor Long's class at UCR.

Momentum:

$\overline{){\mathit{p}}{\mathbf{=}}{\mathit{m}}{\mathit{v}}}$

**(a)**

m = 0.5 kg

v_{0} = 10 m/s

p_{0} = mv_{0} = 0.5 × 10 = 5 kg•m/s

A 0.5 kg ball is thrown horizontally towards a wall with a speed of 10 m/s. The initial velocity is chosen to be the positive x -direction for this question. The ball horizontally rebounds back from the wall with a speed of 10 m/s in the negative x -direction.

(a) What is momentum of the ball before it hits the wall, p_{0}?

(b) What is momentum of the ball after it hits the wall, p_{f}?

(c) What is the change in momentum of the ball, Δp? (Give both magnitude and direction for each answer.)

(d) Is momentum conserved for the ball?