The displacement (x)-time (t) graph given above approximately represents the motion of a _________.
A
Simple pendulum placed in vacuum
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B
Simple pendulum immersed in water
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C
Simple pendulum placed in outer space
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D
Point mass moving in air
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Solution
The correct option is C Simple pendulum immersed in water When a simple pendulum is immersed in water and allowed to oscillate then the displacement time graph is sinusoidal function but due to the viscous force of water the motion of the pendulum is eventually damped as depicted in the graph.