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A bob is pulled sideway so that string becomes parallel to horizontal and released.

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A bob is pulled sideway so that string becomes parallel to horizontal and released. Length of the pendulum is 2 m. If due to air resistance loss of energy is 10%, what is the speed with which the bob arrived at the lowest point.

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\(\frac{1}{2}\)mv2 = 90% of mgh

∴ v = 6 m/s

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