Question

The torque in uniformly rotating fan having blade of length 0.5 m is​

Answer 1

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Zero.

• If it is "uniformly rotating" I am presuming no angular acceleration hence no torque.Similar to no net force being needed to keep something moving at constant velocity.

Answer 2

The torque in a uniformly rotating fan having a blade of length 0.5 m is​ 0.

The torque for a uniform rotational motion is 0 therefore a fan rotating with a uniform circular motion will have 0 torque.

When a body is rotating in a uniform circular motion the net force on it is the centripetal force which is towards the center of rotation.

We know that the torque is the vector product of force and radius, therefore in a uniform circular motion the force vector becomes parallel to the radius vector and hence the torque will be zero.