A pendulum swings at a rate of 0.75 vibrations/second. The frequency of the vibrations can be decreased if:
A
Mass of the bob was increased
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B
Length of the pendulum was increased
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C
Mass of the bob was decreased
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D
Length of the pendulum was decreased
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E
Displacement from zero was increased
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Solution
The correct option is C Length of the pendulum was increased frequency of vibration of a simple pendulum is given by f=1/2π√gl
it is clear from the above formula that frequency of vibration of a pendulum depends upon its length only and is inversely proportional to √l therefore f will decrease when length of pendulum is increased.