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Science Question on Amplitude, Time Period and Frequency of a Vibration

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

Answer

Time Period=Time TakenNumber of oscillations\text {Time\ Period} = \frac {\text {Time\ Taken}}{\text {Number\ of\ oscillations}}

Time Period=440\text {Time\ Period} = \frac {4}{40}

Time Period=0.1 Second\text {Time\ Period}= 0.1\ \text {Second}

Frequency=Number of oscillationsTime Taken\text {Frequency}=\frac {\text {Number\ of\ oscillations}}{\text {Time\ Taken}}

Frequency=404\text {Frequency} =\frac {40}{4}

Frequency=10 Hz\text {Frequency} =10\ Hz