A) Moving up with a constant velocity
B) Accelerating downward
C) Moving down with a constant velocity
D) Accelerating upward
Correct Answer: D
Solution :
When the elevator is moving, we will weigh our normal weight. Since we are already moving at the same speed as the elevator (up or down), nothing is affecting us to change our weight. However, when the elevator starts to go or stops, our body resists it. Let's say we are going up. The elevator stops. According to Newton, our body wants to keep going, but the floor will not let us keep moving. So for a short time, we are pushed into the floor more and our weight goes up. The same thing works when the elevator starts moving. Our body is happy to be standing still. But if the elevator starts to go down, our body wants to stay still. That's why you feel light at first when the elevator starts to go down. Once the elevator starts to move, we get used to moving and we don't feel it anymore.
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