A bullet with a mass of 4.0 g and a speed of650 m>s is fired at a block of wood with a mass of 0.095 kg. Theblock rests on a frictionless surface, and is thin enough that thebullet passes completely through it. Immediately after the bulletexits the block, the speed of the block is 23 m>s. (a) What is thespeed of the bullet when it exits the block? (b) Is the final kineticenergy of this system equal to, less than, or greater than the initialkinetic energy? Explain. (c) Verify your answer to part (b) by calculating the initial and final kinetic energies of the system

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