Physics

Problem

A thin rod

AB

of length

0.50\,\text m

is hinged at

A

. A force of

20\,\text N

acts at

B

, making an angle

30^{\circ}

with the rod and tending to rotate it anticlockwise. At the same time, a force of

15\,\text N

acts perpendicular to the rod at a point

0.25\,\text m

from

A

and tends to rotate it clockwise. Taking anticlockwise torque as positive, the net torque about the hinge is a)

+6.25\,\text{N m}

+4.91\,\text{N m}

-2.50\,\text{N m}

+1.25\,\text{N m}