C-04-Q116mediumsingle_mcq
When an object is lifted vertically upward from the ground, the work done by the lifting force is—
When an object is lifted vertically upward from the ground, the work done by the lifting force is—
- aPositive, because force and displacement are in the same direction
- bNegative, because force is upward but gravity acts downward
- cZero
- dSometimes positive, sometimes negative