Question

what happens to the work done when the displacement of a body is at right angles to the direction of force acting on it? Explain your answer.
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Answer 1

Answer:

when the displacement of the body is at right angle then the work done is zero  

Explanation:

as we know right angle means 90.and we know that,work done=F.d cos o`.here 0`=90.so,W=F.d cos 90

since cos 90=0,so,W=0

here.0` is theta