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# PHYS102Quiz4 - Practice Quiz 4(Chapter 13 1 A pendulum of...

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Practice Quiz 4 (Chapter 13) 1) A pendulum of length L is suspended from the ceiling of an elevator. When the elevator is at rest the period of the pendulum is T . How does the period of the pendulum change when the elevator moves upward with constant acceleration? A) The period does not change. B) The period increases. C) The period decreases. D) The period increases if the upward acceleration is more than g /2 but decreases if the upward acceleration is less than g /2. Answer: C 2) A mass is attached to a spring and oscillates with a period T . If the mass is doubled, what is the new period? A) 2 T B) T /2 C) 2 T D) 2 / T Answer: C 3) A mass of 0.40 kg, hanging from a spring with a spring constant of 80 N/m, is set into an up-and-down simple harmonic motion. What is the speed of the mass when moving through a point at 0.05 m displacement? The starting displacement of the mass is 0.10 m from its equilibrium position. A) zero

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PHYS102Quiz4 - Practice Quiz 4(Chapter 13 1 A pendulum of...

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