1. A 0.50 kg ball is moving with a velocity of 8.0 m/s along a horizontal floor. It hits another ball with a mass of 0.80 kg and moving at 10.0 m/s in the opposite direction. If the first ball bounces back with a velocity of 12 m/s, with what velocity and in what direction will the second ball go after collision?

Question

1.  A 0.50 kg ball is moving with a velocity of 8.0 m/s along a horizontal floor.  It hits another ball with a mass of 0.80 kg and moving at 10.0 m/s in the opposite direction.  If the first ball bounces back with a velocity of 12 m/s, with what velocity and in what direction will the second ball go after collision?

2.  A cannon mounted on the back of a ship fires a 50.0 kg cannonball in the horizontal direction at a speed of 150  m/s.  IF the cannon and ship to which it is firmly attached have a mass of 4.00 x 103 kg and are initially at rest, what is the speed of the ship just after shooting the cannon?  Ignore water resistance.  1.9 m/s opposite cannonball’s velocity.