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A ball with an initial velocity of 10 m/s moves at an angle $60^\circ$ above the $+x$ direction. The ball hits a vertical wall and bounces off so that it is moving $60^\circ$ above the $-x$ direction with the same speed. What is the impulse delivered by the wall?
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Final Answer
$-10m$, where $m$ is the mass of the ball in kilograms.
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OpenStax College Physics Solution, Chapter 8, Problem 20 (Problems & Exercises) (5:53)

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