Question

In order to cause the motion of rotation in rigid pivoted body there must act:

Options

• single force on the rigid body

• A pair of forces on the rigid body in any direction.

• A pair of forces on the rigid body such that forces are unlike parallel forces

• none of these

Answer 1

A pair of forces on the rigid body such that forces are unlike parallel forces

Explanation:

A pair of equal and opposite forces acting along different lines of action forms a couple and produces rotation. Such forces are unlike parallel forces.