How Do I Calculate the Value of g for a Pendulum?

[bidhati]

Homework Statement

I need to work out g for a pendulum. I have values for length (l) and time (T^2)

Homework Equations

T= 2 pi sqroot (l/g)

The Attempt at a Solution

I have plotted a graph of T^2 against l found the gradient of the line is this the value for g or if not do I need to rearrange the equation making g the subject ?

I am not too strong on algerbra and I came up with g = l / (T^2 / 2 pi^2)

but this gives me a silly small amount for g.

the gradient of my graph is 16 which is also a little high for g?

 

[AtomicBartender]

Double check your algebra...did you forget to square the 2 factor also? I think so, see if your answer makes sense then... hope that helps.