3. Calculate the frequency of simple pendulum if its length is 196 cm (g = 9.8 m/s2).
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Answer:
Time period of pendulum is,
T=2π(l/g)^1/2
T=2π(1.96/9.8)^1/2
T=2π*0.44
=2.80
f=1/T
f=1/2.8
=0.357Hz
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