A stone of mass tied to a string of length is rotating along a circular path with constant speed . What will be the torque on the stone?
Step 1: Given:
Stone mass = m
string of length = l
velocity = V
Step 2: Formula
Torque is given by
is acceleration.
r is the axle radius.
v is the speed.
m is the mass of stone.
Step 3: Solution
As the direction of centripetal force and position vector is directed toward center
The torque will be zero.