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Acceleration, a = -kX, where X = x + a. In simple harmonic motion acceleration is directly proportional to the displacement from the mean position. Also the acceleration is in the opposite direction of displacement.

1. Acceleration, a = -kX, where X = x + a.
2. In simple harmonic motion acceleration is directly proportional to the displacement from the mean position.
3. Also the acceleration is in the opposite direction of displacement.
4. Acceleration is proportional to displacement.

Correct answer: In simple harmonic motion acceleration is directly proportional to the displacement from the mean position.

Solution

In simple harmonic motion, the defining characteristic is that acceleration is directly proportional to displacement from the mean position and is directed opposite to it. This matches option B.

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