An elevator is moving downward with decreasing speed. A 50 kg woman is standing

Question

An elevator is moving downward with decreasing speed. A 50 kg woman is standing on an accurate scale placed inside the elevator. Which of the following statements is true? You can ignore air resistance and and friction between the elevator and the walls of the elevator shaft. T denotes the tension in the elevator cable, and mread is the reading on the scale in kg.

A. T is equal to the weight of the elevator and its contents, and mread > 50 kg. B. T is greater than the weight of the elevator and its contents, and mread > 50 kg. C. T is less than the weight of the elevator and its contents, and mread > 50 kg. D. T is greater than the weight of the elevator and its contents, and mread < 50 kg. E. T is less than the weight of the elevator and its contents, and mread < 50 kg. F. T is equal to the weight of the elevator and its contents, and mread < 50 kg.

Which of the following are not a property of an action-reaction pair?  (Mark all that apply) A. The forces are equal in magnitude. B. The forces act on the same body. C. The forces are opposite in direction. D. The forces originate from a single interaction.

Explanation / Answer

B. T is greater than the weight of the elevator and its contents, and mread > 50 kg.

B. The forces act on the same body.

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