You get into an elevator and step onto a bathroom scale, which shows you weigh 150 pounds. The doors close, and the elevator starts to move, very smoothly. You look down, and notice that your weight is now 155 pounds. What can you say about the motion of the elevator? (A) It is moving upward, but slowing down.
(B) It is moving downward, and speeding up.
(C) It is moving downward, but slowing down.
(D) It is moving upward, at a constant speed.