A ball with a mass of 2 kg is rolling at 5 m/s and elastically collides with a resting ball with a mass of 9 kg. What are the post-collision velocities of the balls?
1 Answer
Mar 12, 2016
Explanation:
If post collision velocities be u m/s for 1st one and v m/s for 2nd one ,then applying conservation of momentum
Now collision being elastic KE will be conserved and consequently the relative velocity of 1st object with respect to 2nd is reversed .
So
Comparing (1) and (2)
and