1.

A sphere of mass 0.3 kg moving with a velocity of 4 m/s collides with another sphere of mass 0.5 kg which is at rest. Assuming the collision to be elastic, their velocities after the impact are

Answer»

4 m/s and `0 ms^(-1)`
1 m/s and 3 m/s
2 m/s and 2 m/s
4 m/s and `8 ms^(-1)`

Answer :B


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