PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
## Activity
10.4
- Lift an object up. Work is done by the force exerted by you on the object. The object moves upwards. The force you exerted is in the direction of displacement. However, there is the force of gravity acting on the object.
- Which one of these forces is doing positive work?
- Which one is doing negative work?
- Give reasons.
(1) Which one of these forces is doing positive work?
(2) Which one is doing negative work?
(3) Give reasons.