Which of the following requires the expenditure of more work? (a) Lifting a 90newton [N] weight a height of 5meters [m]. (b) Exerting a force of 60 pounds-force [lb Subscript f ]on a sofa to slide it 30feet [ft] across a room.

Answer: 90 Newton weight a height of 5 meters.

Explanation: To figure out "work", in physical science, the formulais is force X distance = work.

So if you add the the question about the sofa it would look like this

90 X 5 = 450

and the other question just add it in like this

60 X 30 = 180

You can already tell that 450 is bigger than 180