Acceleration of gravity , from a pendulum

  • Thread starter th3plan
  • Start date
1. The problem statement, all variables and given/known data

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 ?



3. 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
 

Hootenanny

Staff Emeritus
Science Advisor
Gold Member
9,594
6
Yes, your answer is correct.
 

HallsofIvy

Science Advisor
41,618
821
Well, you are going to have to explain more exactly what you did.

You have determined that [itex]2\pi \sqrt{800/g}= 10/3[/itex]. 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
Science Advisor
Gold Member
9,594
6
In light of HoI's post, I'm assuming that your in S.I. units.
 
Last edited:
well i use equation T=2pi sqrt( L/g) =T and T is 10/3, so i solved for g, since i know the Lengh is 801m, then i got it to meters
 

Want to reply to this thread?

"Acceleration of gravity , from a pendulum" You must log in or register to reply here.

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving

Top Threads

Top