A force F = 2 N acts on a particle P in the xz-plane. The force F is parallel to x-axis. The particle P (as shown in the figure) is at a distance 3 m and the line joining P with the origin makes angle `30^(@)` with the x-axis. The magnitude of torque on P with respect to origin O (in N-m) is

Options

A. 2
B. 3
C. 4
D. 5

Answer

B

Explanation

`F= 2N, theta= 30^(@), r= 3m`
`tau = Fr sin theta= 2 xx 3 xx sin 30^(@) rArr tau= 3N-m`