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CGP EDU Academic Team
Published on: September 12, 2026
If the length of a pendulum is made 9 times and mass of the bob is made 4 times then the value of time period becomes
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A
The periodic-time of a simple pendulum is given by
$T = 2\pi \sqrt{\frac{l}{g}}$ $T_1 = T, l_1 = 1, l_2 = 9$ $\frac{T_1}{T_2} = \sqrt{\frac{l_1}{l_2}} = \sqrt{\frac{1}{9}} = \frac{1}{3}$ $T_2 = 3T_1 = 3T$
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