In: Physics
Two tennis balls undergo a head-on elastic collision. Under
which of these initial
conditions is it impossible for both balls to be moving in the same
direction after the
collision?
(a) he lighter ball is stationary and the heavier ball
is in motion.
(b) he two balls have the same mass and are initially
moving in the same direction, and they collide
because the faster-moving ball overtakes the
slower-moving one.
(c) he two balls have the same mass and only one
is moving.