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IP A bullet with a mass of 4.1 g and a speed of 640 m/s is...

IP A bullet with a mass of 4.1 g and a speed of 640 m/s is fired at a block of wood with a mass of 9.6×10−2 kg . The block rests on a frictionless surface, and is thin enough that the bullet passes completely through it. Immediately after the bullet exits the block, the speed of the block is 22 m/s .

Part A

What is the speed of the bullet when it exits the block?

Part B
Is the final kinetic energy of this system equal to, less than, or greater than the initial kinetic energy?

Part D

Verify your answer to part B by calculating the initial and final kinetic energies of the system.

Part E

Express your answer using two significant figures.

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