Give five examples of zero work done
Dear student
The examples are:
1. Pushing hard against a wall.
2. Carrying suitcase in our hand.
3. Trying to move a large rock but fail to do so.
4. An electron moving in empty space free of electromagnetic fields does no work as there is no force acting on it. Here in this case Force (F) = 0 but displacement is not zero and is finite.
5. When a force is exerted on an object which does not move,no work is done on the object.
6. In uniform circular motion, only the direction of the velocity is changing, because the force is at right angles to the movement. Since the speed (i.e. the magnitude of the velocity) is constant, no work is being done and the energy remains constant.
7. When a coolie carrying a load on his moves on a horizontal platform, the work done by the coolie against the gravity is 0. Here, Force is perpendicular to the displacement.
Regards
The examples are:
1. Pushing hard against a wall.
2. Carrying suitcase in our hand.
3. Trying to move a large rock but fail to do so.
4. An electron moving in empty space free of electromagnetic fields does no work as there is no force acting on it. Here in this case Force (F) = 0 but displacement is not zero and is finite.
5. When a force is exerted on an object which does not move,no work is done on the object.
6. In uniform circular motion, only the direction of the velocity is changing, because the force is at right angles to the movement. Since the speed (i.e. the magnitude of the velocity) is constant, no work is being done and the energy remains constant.
7. When a coolie carrying a load on his moves on a horizontal platform, the work done by the coolie against the gravity is 0. Here, Force is perpendicular to the displacement.
Regards