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Question

A simple pendulum is oscillating without damping. When the displacement of the bob is less than maximum, its acceleration vector a is correctly shown in (see figure.)

A
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B
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C
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D
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Solution

The correct option is B
In the simple harmonic motion of a pendulum, the restoring force vector (and hence the acceleration vector) is tangential to the path of the bob and is directed towards the mean position. Hence the correct choice is (b).

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