# A completely inelastic collision occurs between two balls of wet putty that move directly toward each other along a vertical axis. Just before the collision, one ball, of mass 3.1 kg, is moving upward at 24 m/s and the other ball, of mass 1.7 kg, is moving downward at 14 m/s. How high do the combined two balls of putty rise above the collision point? (Neglect air drag.)

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A completely inelastic collision occurs between two balls of wet putty that move directly toward each other along a vertical axis. Just before the collision, one ball, of mass 3.1 kg, is moving upward at 24 m/s and the other ball, of mass 1.7 kg, is moving downward at 14 m/s. How high do the combined two balls of putty rise above the collision point? (Neglect air drag.)

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Step 1

From the conservation of momentum.

Step 2

The combine mass moves toward upward. The motion of these balls are under gravity that is motion is under free fall. Therefore, acceleration is –g and the distance cov...

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