Q. A force of 200 N acts tangentially on the rim of a wheel 25 cm in radius. Find the torque
A) 50 Nm
B) 150 Nm
C) 75 Nm
D) 39 Nm
Explanation
(a) Clearly, the question refers to the torque about an axis
through the centre of wheel. Then, since the radius to
the point application of the force is the lever or momentum
arm.
we have
[image:7_image174.emf]
$\tau = 0.25 \times 200 = 50$ Nm
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.