Suppose you are in an elevator. as the elevator starts upward, its speed will increase. during this time when the elevator is moving upward with increasing speed, your weight will be: ) greater than your normal weight at rest. b) equal to your normal weight at rest. c) less than your normal weight at rest.

The answer is A.

Explanation:

Suppose you are in an elevator. As the elevator starts upward, its speed will increase. During this time when the elevator is moving upward with increasing speed, your weight will be greater than your normal weight at rest.

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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