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If a person is pushing a box inside a mo...

If a person is pushing a box inside a moving train , the work in the frame of earth will be:
`vec s_(0)`= displacement of the train relative to ground.
`vec s`=displacement of the box w.r.t. train.

A

zero

B

`vec F .(barx + bar s_(0))`

C

`vec F .vec S`

D

`vec F.vec S_(0)`

Text Solution

Verified by Experts

The correct Answer is:
B
Displacement w.r.t. ground `= ves s + vec s_(0)`
Since train is moving with constant velocity net force acting on block is `= vecF`
Therefore work done` - vec F . (vecS + vecs_(0)))`.
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A2Z-WORK, ENERGY, POWER AND COLLISION-Chapter Test
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