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 appliedby the woman and the frictional force , which is 50 N versus dispalcement Calculate the work done by the two forces over 20 m .

A woman pushes a trunk on a railway platform which has a rough surface

1.	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 appliedby the woman and the frictional force , which is 50 N versus dispalcement Calculate the work done by the two forces over 20 m .
Answer» SOLUTION :`W_(F) =1625 J , W_(f) = - 500 J `