Complete the statement. A batter hits a fly ball into the outfield. The
force is responsible for the ball falling to the ground. *
O the gravitational force
the weak nuclear force
the electromagnetic force
O the strong nuclear force

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.