A ball with a mass of 15 kg moving at 4 m/s hits a still ball with a mass of 24 kg. If the first ball stops moving, how fast is the second ball moving? How much kinetic energy was lost as heat in the collision?
1 Answer
Jan 17, 2016
Speed =
Energy lost = 45J
Explanation:
Momentum is conserved so:
Momentum before = momentum after
Kinetic energy =
KE Before =
KE After =
Energy lost = 120-75=45J