A body of mass m moving with velocity 3k...

A body of mass m moving with velocity `3km//h` collides with a body of mass 2m at rest. Now, the coalesced mass starts to move with a velocity

3 km/h

2 km/h

1 km/h

4 km/h

Text Solution

Verified by Experts

The correct Answer is:

Initial momentum `= mxx 3 + 2m xx 0= 3m`
Final momentum `= 3m xx V`
By the law of conservation of momentum
`3m =3m xx V rArr V= 1 km//h`

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