A woman pushes a trunk on a railway platform that has a rough surface, She applies a force F over a distance of 20 m as shown by the graph. Calculate the work done by the woman.

A woman pushes a trunk on a railway platform that has a rough surface,

1.	A woman pushes a trunk on a railway platform that has a rough surface, She applies a force F over a distance of 20 m as shown by the graph. Calculate the work done by the woman.
Answer» Solution :`W= int FDX =` Area under the graph W = Area of RECTANGLE + Area of trapezium `= (100 N) (10 m) + 1/2 (100 N + 50 N) (10 m)` ` = 1000 J + 750 J = 1750 J. `