A non-zero force is acting on a body but work done is zero. Which of the following statements justify the above situation?
1. Distance moved is zero.
2. Force is perpendicular to the direction of motion.
3. Force is in the direction of motion.
4. Force is opposite to the direction of motion.
1 and 2
Work done by a force on a body is equal to the product of the force applied and the distance moved by the body in the direction of force i.e.,
Work Done = Force×distance moved by the body in the direction of force
If the body does not move even on the application of force, work done will be zero.
The work done by a force is zero if the body moves in a direction perpendicular to the direction of the force.
When a body moves either in the direction or opposite to the direction of force, it will have some displacement. So, work done will not be zero.