A 4.00g bullet, traveling horizontally with a velocity of magnitude 410m/s , is fired into a wooden block with mass of 0.780kg , initially at rest on a level surface. The bullet passes through the block and emerges with its speed reduced to 220m/s . The block slides a distance of 49.0cm along the surface from its initial position.
(a)What is the coefficient of kinetic friction between block and surface?
(b)What is the decrease in kinetic energy of the bullet?
(c)What is the kinetic energy of the block at the instant after the bullet passes through it?
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