# Acceleration of gravity , from a pendulum

## Homework Statement

A space explorer lands on a new plant, and he wants to determin the gravity on it. He makes a pendulum with a lengh of 800 mm and he observes it does 24 full swings in 1min and 20 seconds. What is the acceleration of gravity to be from this ?

## The Attempt at a Solution

period
=2pie multiplied by square root of (lenth of the pendulum over gravity.

period= 80/24=3.333333. gravity = 2.8

Is this right what i did, any help would be great

Related Introductory Physics Homework Help News on Phys.org
Hootenanny
Staff Emeritus
Gold Member

HallsofIvy
Homework Helper
Well, you are going to have to explain more exactly what you did.

You have determined that $2\pi \sqrt{800/g}= 10/3$. Now, exactly how did you solve that equation for g? Also, what units is your answer in? I hate to disagree with Hootenanny but your answer makes no sense until you say what the units are.

(That's not true- I love to disagree with Hootenanny!)

Hootenanny
Staff Emeritus