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The track shown in figure is frictionles...

The track shown in figure is frictionless. The block B of mass 2 m is lying at rest and the block A of mass m is placed along the track with some speed. The collision between A and B is perfectly elastic. With what velocity should the block A be started to get the sleeping man awakened ?

A

Greater than `sqrt(2.5 gh)`

B

Greater than `sqrt(3.5 gh)`

C

Greater than `sqrt(4.5 gh)`

D

Less than `sqrt(2.5 gh)`

Text Solution

Verified by Experts

The correct Answer is:
A
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