SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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sitting on a box
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lifting a box
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carrying a box to the next room
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holding a box
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Detailed explanation-1: -The best example of work being done on an item is lifting a bag of groceries since it is the only instance from the list given in which both force and displacement are present, and both external force and displacement are required to do any non-zero work.
Detailed explanation-2: -Work is done in the following situations : Moving a table. Pushing and pulling a door. Walking.
Detailed explanation-3: -Work done in raising a box depends on the height by which it is raised.
Detailed explanation-4: -And thus we conclude that it is only the case when the box is lifted, the work is done and along with that while we push a stationary box, if the box moves in that case even we see that the work is done because here we get the displacement along with the force applied in the direction of displacement.