4.

A 10-kg suitcase is placed on a scale that is in an elevator. In which direction is the elevator accelerating when the scale reads 75 N and when it reads 120 N? O Downward when it reads 75 N and upward when it reads 120 N O Upward when it reads 75 N and downward when it reads 120 N O Downward in both cases O Upward in both casesA person has a choice of either pushing or pulling a sled at a constant velocity. as the drawing illustrates. Friction is present. It the angle 6 is the same in both cases. does it require less force to push or to pull the sled? \\ it: 0 Push 0 Pull O The magnitude of the force is the same for both pushing and pulling. A box rests on the floor of an elevator. Because of static friction, a force is required to start the box sliding across the floor when the elevator is (a) stationary, (b) accelerating upward, and (c) accelerating downward. Rank the forces required in these three situations in ascending order-that is, smallest first. Ocxb