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August 3, 2015

Homework Help: physics conservation of momentum

Posted by rachel on Saturday, November 8, 2008 at 9:46pm.

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. What is momentum of the ball before it hits the wall, pi? What is momentum of the ball after it hits the wall, pf? What is the change in momentum of the ball, Δp? (Give both magnitude and direction for each answer.) Is momentum conserved for the ball?

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