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A block weighing 40N travels down a smoo...

A block weighing `40N` travels down a smooth fixed curved track `AB` joined to a rough horizontal surface (figure). The rough surface has a friction coefficient of `0.10` with the block. If the block starts slipping on the track from a point `2.0m` above the horizontal surface, the distance it will move on the rough surface is `:-`

A

`40m`

B

`20m`

C

`15m`

D

`10m`

Text Solution

Verified by Experts

The correct Answer is:
B
Apply work enery theorem `W_(1)+W_(2)=DeltaKE`
`rArr-umgS+mgh=0rArrS=(2)/(0.1)=20m`
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