A ball with a mass of #6 kg# moving at #8 ms^-1# hits a still ball with a mass of #4 kg#. If the first ball stops moving, how fast is the second ball moving?
1 Answer
Jan 14, 2016
The total momentum before the collision is equal to the total momentum after. This means the second ball is moving at
Explanation:
The total momentum before the collision is in the moving ball: a stationary object has
Momentum is conserved: the total momentum after the collision is the same as the total momentum before. The momentum is all on one ball since the other is now stationary.
Rearranging: