A 5kg-wt crate is pulled 40m along a horizontal floor by a constant force exerted by a person Fp=150N along the horizontal. The floor is rough and exerts a frictional force FR=20N. Determine the work done by each force acting on the crate.
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Answer:
W=F×s
Work done by person:
W=150×40
= 6000J or 6kJ
Work done by frictioc:
W=20×40
= 800J or 0.8kJ
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