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Pendulums. Energy in Simple Harmonic Motion

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10.2Pendulums. Energy in Simple Harmonic Motion

Pendulums. Energy in Simple Harmonic Motion Revision Questions

1. The period of the pendulums K and P in the figure are 8s and 12s respectively.

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If both bobs are released simultaneously from the rest at the positions shown in the figure, what will their position be after 6s?

Physics Tutorials: This image provides visual information for the physics tutorial Pendulums. Energy in Simple Harmonic Motion

Correct Answer: C

2. The thread of the simple pendulum shown in the figure forms initially an angle of 300 to the horizontal direction. When a 3 kg bob is released, it starts to swing in SHM.

Physics Tutorials: This image provides visual information for the physics tutorial Pendulums. Energy in Simple Harmonic Motion

What is the bob's speed after 1.4 s?

  1. 0
  2. 2.32 m/s
  3. 8.64 m/s
  4. 0.45 m/s

Correct Answer: A

3. Which statement(s) below is (are) correct regarding simple pendulum?

I. In absence of gravity the period of pendulum decreases but it doesn't become zero

II. No matter how heavy the bob is, the pendulum will swing equally for a fixed angle if the angle is small

III. In absence of air the period of pendulum depends only by thread's length and gravity

  1. I only
  2. I and III
  3. II only
  4. II and III

Correct Answer: D

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