A 5.3 g coin sliding to the right at 26.8 cm/s makes an elastic head-on collision with a 15.9 g coin that is initially at rest. After the collision, the 5.3 g coin moves to the left at 13.4 cm/s.

(a) Find the final velocity of the other coin.
cm/s
(b) Find the amount of kinetic energy transferred to the 15.9 g coin.
J