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# A blue puck with mass 0.0400 kg, sliding with a velocity ISBN: 9780321675460 31

## Solution for problem 96P Chapter 8

University Physics | 13th Edition

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Problem 96P

A blue puck with mass 0.0400 kg, sliding with a velocity of magnitude 0.200 m/s on a frictionless, horizontal air table, makes a perfectly elastic, head-on collision with a red puck with mass ?m? initially at rest. After the Collision, the velocity of the blue puck is 0.050 m/s in the same direction as its initial velocity. Find (a) the velocity (magnitude and direction) of the red puck after the collision and (b) the mass ?m? of the red puck.

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Solution 96P Given that, the collision is perfectly elastic. Therefore, the coefficient of restitution is 1. Relative velocity after collision The mathematical relation of coefficient of restitution is e = Relative velocity before collision Given that, initial velocity of blue puck v = 0b200 m/s Initial velocity of red puck v = r Final velocity of blue puck v = 0.050 m/s fb Let v be the final velocity of the red puck. Relative velocity before collision = 0.200 m/s 0 = 0.200 m/s Relative velocity after collision...

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##### ISBN: 9780321675460

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