A ball of mass 10 kg is moving with a velocity of 10 m/s. It strikes another ball of mass 5 kg, which is moving in the same direction with a velocity of 4m/s. If the collision is elastic their velocities after collision will be respectively?
12m/s, 6m/s
8 m/s, 10 m/s
6m/s, 12m/s
10m/s, 8m/s
As we discussed in concept
Net work done by all the forces give the change in kinetic energy -
- wherein
on putting the values
Option 1)
12m/s, 6m/s
Option is incorrect
Option 2)
8 m/s, 10 m/s
Option is incorrect
Option 3)
6m/s, 12m/s
Option is correct
Option 4)
10m/s, 8m/s
Option is incorrect