How much work was done in lifting the crate from the ground to its final position?

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. More than 150 J

2. 150 J

3. None of these

4. No work was done.

5. A bit less than 150 J

Answer 1

Work is Force x Distance.

The amount of work done lifting a 100 N crate a distance of 1.5 m is 150 J. I would say that the answer is 2 (150 J), since we are lifting the crate straight up and not dealing with friction.