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The work done by the normal reaction on ...

The work done by the normal reaction on the rod is :

A

`mgx`

B

` - (mgx)/(2)`

C

`(3)/(2) mgx`

D

`- mgx`

Text Solution

Verified by Experts

The correct Answer is:
B
`Delta K_(R) = w_(G)+w_(N)`
`w_(N) =Delta K-w_(G)=(mgx)/(2)-mgx = -(mgx)/(2)`.
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