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Why the amplitude of the vibrating pendulum should be small? |
Answer» When amplitude of the vibrating pendulum is small then θ is small. Here the restoring force F = -mg sin θ = -mgθ = -mgx/l, where x is the displacement of bob and l is the length of pendulum. Hence F ∝ -x. Since F is directed towards mean position. Therefore, the motion of the bob of simple pendulum will be SHM, if θ is small. |
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