# physics

On planet Earth, a pendulum has a length of L and a period of T .On planet Mars, the pendulum has a length of 4L and period of 5T.what is the acceleration due to gravity ?

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1. g.onMars= g.onEarth*sqrt(4/5)

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2. T = sqrt(L/g)
5T = sqrt (4 L/gm)

5 sqrt (L/g) = sqrt (4 L/gm)

25 L/g = 4 L/gm

gm = g [ 4/25 ]

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posted by Damon

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