Question

Give an example of force acting perpendicular to the direction of displacement.

Answer 1

Force acting perpendicular to the direction of displacement

1. When the force acting on a body is perpendicular to the direction of displacement of that body.
2. As the angle between the force and displacement is perpendicular, the $\theta$ value will be ${90}^{°}$.
3. Since, $\cos 90°=0$, the work done will be zero.

Example: A porter carrying weight on his head while moving horizontally.

1. The angle between the line of force and displacement would perpendicular, hence the $\theta$ value will be ${90}^{°}$.
2. Since, $\cos 90°=0$, the work done will be zero.