# Physics

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The free-fall acceleration on Mars is 3.7 m/s2.
(a) What length pendulum has a period of 4 s on the earth?
cm
What length pendulum would have a 4 s period on Mars?
cm
(b) A mass is suspended from a spring with force constant 10 N/m. Find the mass suspended from this spring that would result in a 4 s period on Earth and on Mars.
Earth kg
Mars kg

• Physics -

The period of a pendulum is
2*pi*sqrt(L/g)

The period of a spring/mass system is
P = 2*pi*sqrt(m/k)

(k is the spring constant and you can guess what m is)

Use these formulas to solve your problems.

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