Assertion :A person working on a horizontal road with a load on his head does no work. Reason: No work is said to be done, if directions of force and displacement of load are perpendicular to each other.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The work done $W = \to F . \to s = F c o s θ$ when a person walk on a horizontal road with load on his head then $θ = 90^{0}$

hence $W = F c o s 90^{0} = 0$

Thus no work is done by the person.

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