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suhel malik Grade:

Q..No work is done by a force on an object if-

(a) the force is always perpendicular to the 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.



one or more than one correct answer question.....

8 years ago

Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points

Dear suhel malik

Option a,c,d are correct.

option a  is correct W=F.x cosΘ    here Θ is 90 so wor done is zero

option c is correct  because  x is zero

option d is correct because x is zero

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8 years ago
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