In the following figure , an object of mass 1.2kg is at rest at point P. IF R and F are the reaction and the frictional force respectively then

Options

A. `R=6N F=6sqrt3N`
B. `R=3N, F=3sqrt3N`
C. `R=6N F=3N`
D. `R=6sqrt3 F=6N`

Answer

D

Explanation

Here, mass of an object m=1.2 kg
In equilibrium,
`R=mg cos 30^@`
`=1.2 times 10 times sqrt3/2 =6sqrt3N`
and `F= mg sin 30^@=1.2 times 10 times 1/2=6N`