18. A 3 years old baby pulling a toy
car on the floor, the baby exerted
force in the direction of the
displacement of car, what would
be nature of work done - positive
or negative work?
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Answer:
If force is applied in the direction of displacement,then angle between force and displacement is 0°.
We know, W=F× Scos theta
cos 0°=1
W=F × S.
Which means work done is positive.......
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