A billiard ball moving at 5.30 m/s strikes a stationary ball of the same mass. After the collision, the first ball moves at 4.72 m/s, at an angle of 27.0° with respect to the original line of motion.
(a) Find the velocity (magnitude and direction) of the second ball after collision.
m/s
° (with respect to the original line of motion, include the sign of your answer; consider the sign of the first ball's angle)
(b) Was the collision inelastic or elastic?
inelastic
elastic