# An astronaut has landed on Planet N-40 and conducts an experiment to

1. Jun 21, 2014

### chemistrymole

1. The problem statement, all variables and given/known data

An astronaut has landed on Planet N-40 and conducts an experiment to determine the acceleration due to gravity on that planet. She uses a simple pendulum that is 0.640 m long and measures that 10 complete oscillations 26.0 s. What is the acceleration of gravity on Planet N-40?

2. Relevant equations

I am not sure what to use.

3. The attempt at a solution

I tried using T=2pi square root L/g and solve for g and plugged everything in. Period T I did 26/10 so 1 period every 2.6 seconds I got g=.595 and is non of the choices.

It is this formula above. I solved for g wrong. Now I got the correct answer thank you everyone.

Last edited: Jun 21, 2014
2. Jun 21, 2014

### axmls

There's a formula that you can use. Find the period and you should be able to solve for g.

Edit:
What formula did you get when you solved for g? I got a different answer.

Last edited: Jun 21, 2014
3. Jun 21, 2014

### chemistrymole

When I caught my error I redid it and got g=(4pi^2 *L)/(T)^2

4. Jun 21, 2014

### axmls

That should give you the correct answer.

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