The monkey is perched on a vine 5m above the ground. If the monkey throws the banana up in the air at 12m/s: a) when did the banana land on the ground? b) How fast was the banana going when it hit the ground?

In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.