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A block of mass is kept on an inclined p...

A block of mass is kept on an inclined plane of a lift moving down with acceleration of `2 ms^(-2)` What should be the minimum coefficient of friction to let the block move down with constant velocity?

A

`mu=(1)/(sqrt(3))`

B

`mu=0.4`

C

`mu=0.8`

D

`mu=(sqrt(3))/(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
(a) `m(g-a)sin theta=mu m(g-a)cos theta`
lt brgt `implies" " mu=tan theta=tan 30^(@)=(1)/(sqrt(3))`
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