Q. 65.0( 1 Vote )

No work is done b A. the force is always perpendicular to its velocity

B. the force is always perpendicular to its acceleration

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

D. the object moves in such a way that the point of application of the force remains fixed.

Answer :

Here as there is no displacement along the force when it is perpendicular to the velocity of an object, so no work is done.


Option B is not correct because the acceleration will always be in the direction of force according to Newton’s second la of motion.


Also, for work to be done there must be displacement of the object, hence option C is not correct.


In case of option D also there is no displacement in the direction of applied force, so here also no work is done.

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