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A pendulum oscillates 40 times in 4 seconds. Find its time period and frequency.

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Frequency of oscillations is the number of oscillations of a vibrating object per second. Therefore frequency is = 40 vibrations /4 seconds= 10 Hertz. 

Time period is the time required to complete one oscillation. Or it is the inverse of time period. 

Therefore time period = 1/10 = 0.1 seconds.

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