Question

Work done by a force is negative . Angle between force and displacement is

• A. $0^{\circ }$
• B. ${45}^{\circ }$
• C. ${90}^{\circ }$
• D. $\text{More than}{90}^{\circ }$

Answer 1

The correct option is D $\text{More than}{90}^{\circ }$

Work done by a force applied at an angle is F.S cos $\theta$. Value of cos $\theta$ is negative for $\theta >{90}^0$. Thus work done will be negative.

The work done may be positive, zero or negative depending on the angle between the force and the displacement: