If you performed a work "W" on an object and no external forces are acting on you and the object, while doing this work, which of the following can be true:

Work done by the object on you is "-W"

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Work done on you is "-W"

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Work done by the object is "-W"

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Work done by you is "W"

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Solution

The correct option is D
Work done by you is "W"

When no other forces are acting, you and the object apply equal and opposite forces on each other. Since the displacement is same for both, work done will be equal in magnitude but opposite in sign.

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If you performed a work "W" on an object. No external forces are acting on you and the object, while doing this work. Which of the following can be true

Q. Can normal force do nonzero work on an object? If yes, give an example. If no, give reason.

Can normal force do a nonzero work on an object.

If there are no external forces acting on an object, it will

One way that you can recognize that a force is acting on an object:

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If you performed a work "W" on an object and no external forces are acting on you and the object, while doing this work, which of the following can be true:

The correct option is D Work done by you is "W" When no other forces are acting, you and the object apply equal and opposite forces on each other. Since the displacement is same for both, work done will be equal in magnitude but opposite in sign.

The correct option is D
Work done by you is "W"

When no other forces are acting, you and the object apply equal and opposite forces on each other. Since the displacement is same for both, work done will be equal in magnitude but opposite in sign.