= 19.6mm2 ±0.2. Percentage uncertainty in the weight = (0.3/8) x 100 = 3.75 m - for length These modules are meant as an introduction to uncertainty analysis as it will be performed in your Physics Lab Courses. Using the scale division on the scale. Potential energy = mgh In this tutorial, you will learn the following: This is what you need to know for your AS, A-Level or IB curriculum involving errors and uncertainties; they are covered comprehensively in such a way that you don't need any additional information to complement them. Physics is an important and basic part of physical science. Random errorsA random error, is an error which affects a reading at random.Sources of random errors include: A systematic error, is an error which occurs at each reading.Sources of systematic errors include: PrecisionA measurement is said to be accurate if it has little systematic errors. In physics, as in every other experimental science, one cannot make any measurement without having some degree of uncertainty. Kinematics of simple harmonic motion (SHM), Energy changes during simple harmonic motion (SHM), The observer being less than perfect in the same way every time, An instrument that is improperly calibrated, Add error bars only to the first and last points, Only add error bars to the point with the worst uncertainty, Add error bars to all points but use the uncertainty of the worst point, Only add error bars to the axis with the worst uncertainty. Type B evaluation of standard uncertainty – method of evaluation of uncertainty by means other than the statistical analysis of series of observations [ISO, 3]. Depending on the precision that you choose, or the absolute uncertainty, the possible values of lower and upper bound are automatically calculated.  Vivax Solutions;  All rights reserved. Types of Uncertainties