Question

Give two examples of (i) positive work (ii) negative work (iii) zero work

Answer 1

Positive work -

1. Pushing a box through a distance.

2. Lift a book through a height.

Negative work -

1. Work done by force of gravity on an object when lifted.

2. Work done by friction when we walk.

Zero work -

1. Pushing a wall.

2. Walking while holding an object.