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