If you lift a 80 N book 50 cm off the floor, how much work did you do?
1. 0
2. 4000 J
3. 40 J
4. 1.6 J
A man pushes a couch a distance of 0.75 m. If 450 J of work is done, what is the magnitude of the force applied?
1. 16.9 J
2. 45
3. 1350 J
4. 2700 J