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# Manipulating graphs watch

1. Hi there,

In physics we are always doing experiments and manipulating data to produce a straight line graph.

As an example, we used data from the internet to see how the centripetal acceleration of planets changes with distance from the sun in our solar system.

How would I go about turning this data into a straight line graph?

I know that a straight line has the equation y=mx+c and the equation for centripetal acceleration is a=(v^2)/r. So in this case it's in the form of y=(m^2)/x but I can't see how to manipulate my data to get a straight line. as plotting acceleration against 1/radius doesn't seem to work.

Any help appreciated.
2. (Original post by Sir_Malc)
Hi there,

In physics we are always doing experiments and manipulating data to produce a straight line graph.

As an example, we used data from the internet to see how the centripetal acceleration of planets changes with distance from the sun in our solar system.

How would I go about turning this data into a straight line graph?

I know that a straight line has the equation y=mx+c and the equation for centripetal acceleration is a=(v^2)/r. So in this case it's in the form of y=(m^2)/x but I can't see how to manipulate my data to get a straight line. as plotting acceleration against 1/radius doesn't seem to work.

Any help appreciated.
There is an issue with the equation that you are using.
When you change r, v also changes.
3. (Original post by Eimmanuel)
There is an issue with the equation that you are using.
When you change r, v also changes.
Should I be using a=(omega)^2 r ?
4. (Original post by Sir_Malc)
Should I be using a=(omega)^2 r ?
You can try. I am not sure that if all the planets have the same omega. They may have slightly different omega.

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