Ball 1, with a mass of 130 g and traveling at 13 m/s , collides
head on with ball 2, which has a mass of 310 g and is initially at
rest. A)What is the final velocity of the ball 1 if the collision
is perfectly elastic. B)What is the final velocity of the ball 2 if
the collision is perfectly elastic. C)What is the final velocity of
the ball 1 if the collision is perfectly inelastic. D)What is the...