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

Explanation

To solve the problem step by step, we will follow the instructions given in the question and calculate the work done by the woman and the frictional force.

### Step 1: Understanding the Forces
- The woman applies a force of 100 N for the first 10 m.
- After 10 m, her force decreases linearly to 50 N by the time she has pushed the trunk for a total distance of 20 m.
- The frictional force opposing her push is constant at 50 N.

### Step 2: Plotting the Forces
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