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Work done by a force on an object is zer...

Work done by a force on an object is zero, if

A

the force is always perpendicular to its acceleration

B

the object is stationary but the point of application of the force moves on the object

C

the force is always perpendicular to its velocity

D

the object moves in such away that the point of application of the force remains fixed

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The correct Answer is:
B, C, D
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