# What do errors represent?

1. Feb 4, 2008

### fact file

I am writing a lab report on Newton's second law.....:) I got some errors while calculating the slope (mass).

What factors could bring out those errors? and How can they be imporved?

I don understand what i m suppose to approach....If anybody cud help me with that...thanks

2. Feb 4, 2008

### Andy Resnick

Without knowing any details of the experiment- without knowing what you measured- it's tough to say where the sources of error are.

John Taylor's book "An Introduction to error analysis" is a must-read, but to distill down some formulas: I'm new to the latex stuff, so let's hope I get the formulas correct....

if q = Bx, and B is known exactly, then $$\delta q = B \delta x$$
if q = q(x), then $$\deltaq=|dq/dx|\delta x$$

I'll stop there and see if my typesetting is ok.