# Percent error using acceleration and 1/mass

I'm doing a lab where I had to use a cart and a pully, collecting data to compare the net force and the acceleration and again for acceleration vs mass. The acceleration vs mass graph was a curve, wich we then straightened out to give us a graph of acceleration vs 1/mass. I am wondering how i would go about to find my accepted value to use in my percent error equation. thank you ahead of time :)

Delphi51
Homework Helper
Welcome to PF, mj.
Since F = ma, a = F*1/m.
Comparing that with good old y = mx + b, the slope on the a vs 1/m graph should be F.
I trust you used the same force for all the data points. The force you used is your "accepted value" for the slope.

Welcome to PF, mj.
Since F = ma, a = F*1/m.
Comparing that with good old y = mx + b, the slope on the a vs 1/m graph should be F.
I trust you used the same force for all the data points. The force you used is your "accepted value" for the slope.

YES ! i totally understand :) my slope is in Newtons so it would turn out to be F ! Thank you !