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

Options

A. `R=6 N, f=6 sqrt(3)N`
B. `R=3 N, f= 3 sqrt(3) N`
C. `R=6 N, F=3 N`
D. `R6sqrt(3) N, F=6N`

Answer

D

Explanation

Here , mass of an object `m= 1.2 kg `

In equilibrium, `R= mg cos 30^@ = 1.2 xx 10 xx ( sqrt(3))/(2) = 6 sqrt(3)N`
and `F = mg sin 30^@ = 1.2 xx 10xx (1)/(2) = 6N`