AP Physics 1 Question 28: Answer and Explanation

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Question: 28


A simple pendulum executes simple harmonic motion as it swings through small angles of oscillation. If θmax denotes the amplitude of the oscillations, which of the following statements is true?

  • A. When θ = 0, the tangential acceleration is 0.
  • B. When θ = θmax, the tangential acceleration is 0.
  • C. When θ = 0, the speed is 0.
  • D. When θ = 0, the restoring force is maximized.

Correct Answer: A


A At the instant a simple harmonic oscillator passes through equilibrium, the restoring force is zero. Therefore, the tangential acceleration of the pendulum is also zero.