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A small block of mass of 0.1 kg lies on ...

A small block of mass of `0.1 kg` lies on a fixed inclined plane `PQ` which makes an angle `theta` with the horizontal. A horizontal force of `1N` acts on the block through its centre of mass as shown in the figure. The block remains stationary if ( take `g=10 m//s^(2))`

A

`theta = 45^(@)`

B

`theta gt 45^(@)` and a frictional force acts on the block towards

C

`theta gt 45^(@)`and a frictional force acts on the block towards

D

`theta lt 45^(@)` and a frictional force acts on the block towards Q

Text Solution

Verified by Experts

The correct Answer is:
A, C
f = 0, If `mg sin theta = F cos theta implies theta = 45^(@)`
f towards Q, `mg sin theta gt F cos theta implies theta gt 45^(@)`
f towards P, `mg sin theta lt F cos theta implies theta le 45^(@)`
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