Teach & help me pls?

1 answer:

6 0

T=2π√l/g
T/2π=√l/g
(T/2π)²=l/g
g=l/(T/2π)²
g=l/T²/4π²
g=4π²l/T²

T=2π√8/2
T=2π*2
T=4π

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