A body is in pure rolling on a surface. Is it necessarily being acted upon by an external torque ?

If a body is rotating, is it necessarily being acted upon by an external torque ?

A body is rotating, it is necessary being acted upon by an exteral torque?

If a body is rotating, is it necessarily being acted by an external torque?

A body is acted upon by balanced forces

A body is acted upon by balanced forces

A body is in rotational motion. Is it necessary that a torque be acting on it ?

A : rigid body can't be in a pure rolling on a rough inclined plane without giving any external force. R : Since there is no torque providing force acting on the body in the above case, the body can't come in a rolling condition.

A : rigid body can't be in a pure rolling on a rough inclined plane without giving any external force. R : Since there is no torque providing force acting on the body in the above case, the body can't come in a rolling condition.