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December 19, 2014

December 19, 2014

Posted by **Anonymous** on Monday, December 6, 2010 at 10:31am.

(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

I know the formulas, but for some reason I'm not getting it. How do I solve for L? Is it 2*pi*2*g? I'm confused.

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)

- Physics Help please -
**bobpursley**, Monday, December 6, 2010 at 10:34amperiod=2PI sqrt(L/g)

square both sides.

T^2=4PI^2 * L/g

L= g*T^2/(4PI^2)

go after mass the same way.

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