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A woman pushes a trunk on a railway plat...

A woman pushes a trunk on a railway platform which has a rough surface . She applies a force of 100 N over a distance of 10 m . Thereafter ,she gets progressively tired and her applied force reduces linearly with distance to 50 N . The total distance through which the trunk has been moved is 20 m . Plot the force applied by the woman and the frictional force , which is 50 N versus dispalcement Calculate the work done by the two forces over 20 m .

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`W_(f) =1625 J , W_(f) = - 500 J `
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A woman pushes a trunk on a railway platform which has a rough surface. She applies a force of 100 N over a distance of 10m. Thereafter, she gets progressively tired and her applied force reduces linearly with distance to 50 N. The total distance through which the trunk has been moved is 20m. Plot the force applied by the woman and the frictional force, which is 50 N versus displacement. Calculate the work done by the two forces over 20 m.

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