Pendulum's period on the earth to period on a moon: moon's gravity acceleration.

A simple pendulum, length L, completes 12 oscillations in 30 seconds here on the earth where g= 9.8 nt/kg. The same length pendulum on a certain moon of Jupiter, completes 18 oscillations in 54 seconds.

a.) Find the acceleration of gravity, g1, on that moon.

b.) Find the weight on the surface of that moon, of a person whose weight on the surface of the earth is W=686 nt.

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