Answer to Question #62738 in Physics for Sean

Question

How Much work is done on an object by the force that supports it as the object is lowered at a constant speed through a vertical distance n? how much work does the gravitational force on the object do in the same process?

Answer 1

The work of the support force:
w = -mgn (because the force and displacement have opposite directions)

The work of the gravitational force:
w = mgn (because the gravitational force and the displacement have equal directions)