A force is applied at a point from the hinge of a door

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

40\,\text{N}

force is applied at a point

0.30\,\text{m}

from the hinge of a door. The force makes an angle of

60^{\circ}

with the line joining the hinge to the point of application. The magnitude of the torque about the hinge is (a)

12.0\,\text{N m}

(b)

8.0\,\text{N m}

(c)

10.4\,\text{N m}

(d)

6.0\,\text{N m}