First slide

Applications of SHM

Question

The length of a seconds pendulum is

Easy

A

99.8 cm
B

99 cm
C

100 cm
D

None of these

Solution

$T = 2 π \sqrt{l / g} \Rightarrow l = \frac{{gT}^{2}}{4 π^{2}} = \frac{9 .8 \times 4}{4 \times π^{2}} = 99 cm$

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