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Assertion : No work is done when a woman...

Assertion : No work is done when a woman carrying a load on her head, walks on a level road with a uniform velocity.
Reason : No work is done if the force is perpendicular to the direction of displacement.

A

If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

B

If both Assertion and Reason are true but Reason is not correct explanation of Assertion.

C

If Assertion is true but Reason is false.

D

If both Assertion and Reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
Work done `W = vecF.vec(ds) = Fds cos theta = theta` when `A = 90^@`. No work is done when force is normal to the displacement.
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