A 20.0 kg box is suspended from a rope attached to the roof of an elevator. The

Question

A 20.0 kg box is suspended from a rope attached to the roof of an elevator. The elevator is moving down at a constant speed of 20 m/s. Questions 20-22 refer to this situation. 20. This situation is described by Newton's a. First law; b. Second law 21. The tension in the rope a. Is less than the weight of the box b. Equals the weight of the box; c. Is greater than the weight of the box. 22. The net force on the box is a. Pointing up: b. Pointing down; c. Zero The elevator in the previous passage is now still moving down but coming to a halt. Questions 23-25 refer to this new situation. 23. This situation is described by Newton's a. First law b. Second law 24. The tension in the rope a. Is less than the weight of the box; b. Equals the weight of the box; c. Is greater than the weight of the box. 25. The net force on the box is a Pointing up: b. Pointing down; c. Zero 26. Compared to their values on Earth, on the Moon: a. G is the same; g is different b. G is different, g is the same c. G and g are both different; d. G and g are both the same

Explanation / Answer

this situation is described by second law

tension of the string will be equal to the weight of the box as net force due to elevator is 0 since velocity is constant

net force on the box will be 0

this situation is described by first law

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