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?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Intro to Conservation of Momentum concept. You can view video lessons to learn Intro to Conservation of Momentum. Or if you need more Intro to Conservation of Momentum practice, you can also practice Intro to Conservation of Momentum practice problems.

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