An inclined plane is inclined at an angle `theta` when the block placed on it is just at the point of moving down the plane. What can be minimum acceleration with which the block can be moved up the inclined plane?

Options

A. `g sin theta`
B. `2g sin theta`
C. `3g sin theta`
D. `4g sin theta`

Answer

b

Explanation

`a=("Total force")/(mass)=(mg sin theta+ mu mg cos theta )/(m)`
`=g(sin theta+mu cos theta)=g(sin theta+tan theta cos theta)`
`=g(sin theta+sin theta)=2g sin theta`
(b) is the choice