Problem 23:   A cue ball of mass m1 = 0.365 kg is shot at another billiard ball, with mass m2 = 0.505 kg, which is at rest. The cue ball has an initial speed of v = 6.5 m/s in the positive direction. Assume that the collision is elastic and exactly head-on. Part (b)  What is the velocity of the horizontal component after the collision, in meters per second?  Part (d)  What is the horizontal component of the cue ball's final velocity, in meters per second?

Principles of Physics: A Calculus-Based Text
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Author:Raymond A. Serway, John W. Jewett
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Chapter8: Momentum And Collisions
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Problem 23:   A cue ball of mass m1 = 0.365 kg is shot at another billiard ball, with mass m2 = 0.505 kg, which is at rest. The cue ball has an initial speed of v = 6.5 m/s in the positive direction. Assume that the collision is elastic and exactly head-on.

Part (b)  What is the velocity of the horizontal component after the collision, in meters per second? 

Part (d)  What is the horizontal component of the cue ball's final velocity, in meters per second? 

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