In this question, a statement of assertion 
is followed by a statement of reason 
. Mark the correct choice as:
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.
Text Solution
Verified by ExpertsThe correct answer is:
A
The work done, 
, when a person walk on a horizontal road with load on
his head than 
.
Hence, 
.
Thus no work is done by the person.
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