Pendulum acceleration homework

  • Thread starter ahrog
  • Start date
  • #1
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Homework Statement



A pendulum with is 2.00 m long makes 84.5 complete oscillations in 4.00 minutes. What is the acceleration of gravity at that spot?


Homework Equations



TG=(4pi^2/T^2)L


The Attempt at a Solution



g=(4pi^2/240s^2)2.00m
g= 0.0013707...

Which doesn't make sense, and it seems way to simple to be getting 8 marks for it. What am I missing?
 

Answers and Replies

  • #2
rl.bhat
Homework Helper
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Find the time for one oscillation.
 
  • #3
Nabeshin
Science Advisor
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In your solution you seem to have just put in 240s for the period. This would certainly be true if the pendulum completed one oscillation in four minutes...
 
  • #4
46
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Oh geez *smacks head* Such an easy solution. Thanks!
 

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