Pendulum

[ahrog]

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

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?


2. Relevant equations

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


3. 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?

[rl.bhat]

Find the time for one oscillation.

[Nabeshin]

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...

[ahrog]

Oh geez *smacks head* Such an easy solution. Thanks!