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A box is placed on an inclined plane and...

A box is placed on an inclined plane and has to be pushed down.The angle of inclination is

A

equal to angle of friction

B

more than angle of friction

C

equal to angle of repose

D

less than angle of repose

Text Solution

Verified by Experts

The correct Answer is:
D
`mu mg cos theta gt mg sin theta`
`mu gt tan theta`
`tan alpha gt tan theta`
`alpha gt theta ,alpha : angle of friction`
When the block is about to move on rough inclined plane , angle of friction = angle of repose
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