Explain any two examples when work done is

(i) positive.

Positive work done:

When force and displacement acts in the same direction, the work done on the body is positive.

Example:

1. A girl pulling a box towards herself: In this example, the force and displacement have the same direction, hence the work done is positive.
2. An apple falling from the tree: In this example, the gravitational force is pulling the apple downwards, and the apple displaces in the same direction, hence the work done is positive.