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Part A Which of the following is a true statement about the acceleration of the pendulum bob, ã. O a is equal to the acceleration due to gravity O a is equal to the instantaneous rate of change in velocity. O ã is perpendicular to the bobs trajectory. O ã is tangent to the bobs trajectory. Submit uest Answer Part B What is the direction of a when the pendulum is at position 1 Enter the letter of the arrow parallel to a. View Available Hint(s) Submit Part C What is the direction of a at the moment the pendulum passes position 2? Enter the letter of the arrow that best approximates the direction of a View Available Hint(s)

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The acceleration of the bob depends upon the acceleration due to gravity and the tension in the string. Therefore, ä is equal to the instantaneous rate of change in velocity. The pendulum reaches position 1: It has the tangential velocity and the acceleration component gs1ηθ along the direction of H in the given figure. Therefore, the direction of ä when the pendulum reaches position 1 is The pendulum reaches position 2: The acceleration of the pendulum acts in downward direction and the direction of the acceleration is upward Therefore, the direction of ä when the pendulum reaches position 2 is C. The pendulum reaches position 3: It has the tangential velocity and the acceleration component g sin θ along the direction of F in the given figure. Therefore, the direction of a when the pendulum reaches position 3 is F.

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Which of the following is a true statement about the acceleration of the pendulum bob, ã. O a is equal to the acceleration due to gravity O a is equal to the instantaneous rate of change in velocity.
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