A box is raised at constant speed by a man pulling up on a rope. Assume that air resistance on the box is negligible. The rope breaks and the box falls to the ground. Assume that air resistance on the box is negligible. During the fall, which of these statements are true? 1 The work performed by all conservative forces on the box is 0. 2 The work performed by all non‑conservative forces on the box is 0. 3 The net work performed on the box is 0. 4 The work performed by all conservative forces on the box is positive. 5 The work performed by all non‑conservative forces on the box is positive.
A box is raised at constant speed by a man pulling up on a rope. Assume that air resistance on the box is negligible. The rope breaks and the box falls to the ground. Assume that air resistance on the box is negligible. During the fall, which of these statements are true? 1 The work performed by all conservative forces on the box is 0. 2 The work performed by all non‑conservative forces on the box is 0. 3 The net work performed on the box is 0. 4 The work performed by all conservative forces on the box is positive. 5 The work performed by all non‑conservative forces on the box is positive.
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ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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A box is raised at constant speed by a man pulling up on a rope. Assume that air resistance on the box is negligible.
The rope breaks and the box falls to the ground. Assume that air resistance on the box is negligible.
During the fall, which of these statements are true?
1 The work performed by all conservative forces on the box is 0.
2 The work performed by all non‑conservative forces on the box is 0.
3 The net work performed on the box is 0.
4 The work performed by all conservative forces on the box is positive.
5 The work performed by all non‑conservative forces on the box is positive.
Use the work‑energy theorem to determine which one of these statements is true during the fall.
1 The change in the total energy of the box is 0.
2 The change in the total energy of the box is positive.
3 The change in the total energy of the box is negative.
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