Question

A crate is lifted vertically 1.5 m and then held
at rest. The crate has weight 100 N (i.e., it is
supported by an upward force of 100 N).
How much work was done in lifting the
crate from the ground to its final position?
1. A bit less than 150 J
2. No work was done.
3. More than 150 J
4. None of these
5. 150 J

Answer 1

$$W=Fh$$

$$W=(100)(1.5)=150\ J$$

Answer: 5. 150 J