How long must a simple pendulum be if it is to make exactly one swing per second?

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Answer 1 · 2017-07-23T06:30:49

1m

Time period (T) of simple pendulum is given as

#T = 2πsqrt(L/g)#

Rearranging the equation..,

#L = (T^(2)g)/(4pi^2)#

One swing per second means it takes 2 seconds for one complete oscillation.

#L = (2^2 × 9.8) / (4 × 3.14^2)#

#L ≈ 1m#