A heavy box is kept on a smooth inclined plane and is pushed up by a force F acting parallel to the plane. Does the work done by the force F as the box goes from A to B depend on how fast the box was moving at A and B? Does the work by the force of gravity depend on this?

(i) No, the work done doesn’t depend on how fast the box moved because we perform the action on a frictionless surface. As, the work done is directly proportional to the work and the displacement of the object, those are the only two quantities the work done depends upon.


(ii) No, Because Gravity is conservative force and work done by a conservative force is only dependent of the displacement of the object.


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