Drive an expression for work done in moving a body over rough horizontal surface
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.friction force, f=μR=μmgcosθ
μ is the coefficient of the friction.
Net force in forward direction, F=mgsinθ−μmgcosθ
Let the distance travelled by the body is ,S.
work done, W=F.S
W=(mgsinθ−μmgcosθ).S
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