Solve this : "DO NOT SEND THE SIMILAR QUEIRIES"
Q5. Give an example when work done by a force acting on a body is zero even though the body gets displaced from its initial position by the application of the force.
Dear students,
Zero Work done: When the force applied or the displacement or both are zero, or force and displacement are perpendicular to each other, the work done is zero.
Examples of zero work : When we push hard against a wall, the force we exert on the wall does no work, because displacement s is zero. However, in this process, our muscles are contracting and relaxing alternately and internal energy is used. That is why we get tired.
When a porter carrying some load on his head, he moves on a horizontal platform, Force due to gravity is down ward due to weight. Therefore the work done by the porter is zero.
Regards
Zero Work done: When the force applied or the displacement or both are zero, or force and displacement are perpendicular to each other, the work done is zero.
Examples of zero work : When we push hard against a wall, the force we exert on the wall does no work, because displacement s is zero. However, in this process, our muscles are contracting and relaxing alternately and internal energy is used. That is why we get tired.
When a porter carrying some load on his head, he moves on a horizontal platform, Force due to gravity is down ward due to weight. Therefore the work done by the porter is zero.
Regards