When is torque zero?
Understand the Problem
The question is asking about the conditions under which torque is equal to zero. Torque can be considered to be zero when the force applied is acting at the pivot point or when the line of action of the force passes through the pivot point, resulting in no rotational effect. This often occurs if the object is in equilibrium or when forces are balanced.
Answer
When the force passes through the axis of rotation
The torque of a force is zero if the force passes through the axis of rotation, i.e., the perpendicular distance of the force from the axis is zero.
Answer for screen readers
The torque of a force is zero if the force passes through the axis of rotation, i.e., the perpendicular distance of the force from the axis is zero.
More Information
Torque is a measure of the rotational force applied on an object. For torque to be zero, the line of action of the force must pass through the axis of rotation, making the lever arm distance zero.
