0.120 stone rests on a frictionless, horizontal surface. A bullet of mass 5.00 , traveling horizontally at 370 , strikes the stone and rebounds horizontally at right angles to its original direction with a speed of 200 .
a) Compute the magnitude of the velocity of the stone after it is struck.
b) Compute the direction of the velocity of the stone after it is struck.
c) Is the collision perfectly elastic? yes or no