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An Arrow (0.5 kg) travels with velocity 50 m/s to the right when it pierces an...

An Arrow (0.5 kg) travels with velocity 50 m/s to the right when it pierces an apple (2 kg) which is initially at rest. After the collision, the arrow and the apple are stuck together. Assume that no external forces are present and therefore the momentum for the system is conserved. What is the final velocity (in m/s) of apple and arrow after the collision?
10.0 m/s

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What is the final kinetic energy of the apple and arrow system?

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