Physics A.1

acceleration

the rate of change of velocity

velocity

the rate of change of position

displacement

the change in position

projectile motion

constant horizontal velocity and constant vertical acceleration

random uncertainty

statistical variation in a set of measurements of the same quantity

systematic uncertainty

constant value of uncertainty (or is independent of the actual value measured)

absolute uncertainty

the actual uncertainty associated with any measured value (can also be the smallest in a measuring instrument)

fractional uncertainty

change in x / x

percentage uncertainty

(change in x / x) * 100

accuracy

how close a measurement is to the true value

precision

the degree to which repeated measurements show the same result (can also be the smallest value an increment can measure)

vector

quantity with a magnitude and a direction

scalar

quantity with only magnitude