22. When a block slides a certain distance down an incline, the work done by gravity is 300 J . What is the work done by gravity if this block slides the same distance up the incline?
(A) 300 J
(B) Zero
(C) -300 J
(D) It cannot be determined without knowing the distance the block slides.
(E) It cannot be determined without knowing the coefficient of friction.
(A) 300 J
(B) Zero
(C) -300 J
(D) It cannot be determined without knowing the distance the block slides.
(E) It cannot be determined without knowing the coefficient of friction.