Oscillatory Motion :: Discussion


7.The length of a simple pendulum executing simple harmonic motion is increased by 21%. The percentage increase in the time period of the pendulum of increases length is?
A.50%
B.21%
C.30%
D.10.5%
Answer:  Option  D
Explanation:

Time period,
T=2π√(l/g)
The percentage increase in a time period is given by,
∆T/T×100=1/2×∆l/l×100
∆T/T×100=1/2×21%=10.5%.

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Published by:Michael Daani

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