PHYS211_checkpoint5

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University of Illinois, Urbana Champaign *

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211

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Physics

Date

Apr 3, 2024

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pdf

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6

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Physics 211 Spring 2021 February 2021 1) 2) Forces and Free-Body Diagrams (Default) The next two questions pertain to the situation described below. A box of mass m hangs by a string from the ceiling of an elevator that is accelerating upward. Which of the following best describes the tension T in the string? a. T < mg b. T = mg c. T > mg Briefly explain your answer to the previous question.
3) 4) The next two questions pertain to the situation described below. A box of mass m is hung by a spring from the ceiling of an elevator. When the elevator is at rest, the length of the spring is L = 1m. As the elevator accelerates upward, the length of the spring will be a. L < 1 m b. L = 1 m c. L > 1 m Briefly explain your answer to the previous question.
5) 6) The next two questions pertain to the situation described below. A block sits at rest on a horizontal frictionless surface. Which of the follwoing sketches most closely resembles the correct free body diagram for all forces acting on the block. Each red arrow represents a force. a. A b. B c. C d. D Briefly describe the forces represented by each of the arrows in your choice for the above question.
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