Question

5 examples of positive work and give explaination on each example

Answer 1

1. work done by free falling body under the action of gravity. angle =0 hence = +ve.
2. When a spring is stretched if the stretching force and displacement are in same. direction. angle =0 .
3. work done by a man pushing a box in the direction of force . angle = 0.
4. work done by a horse pulling a cart .displacement is in the direction of force.
5. A train engine pulling the train wagon. angle is 0 .