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Physics SHM ISA

Physics ISA AQA 2012

QuestionAnswer
What is free oscillation? When the amplitude is constant because no frictional forces are acting.
What is angular frequency? 2*pi*f OR (2xpi)/T
What is the unit for angular frequency? rad per second
What is the phase difference? (2*pi*delta t)/T
What conditions must be satisfied to use the phase difference equation? The objects must be oscillating at the same frequency.
What is the formula for acceleration? -(2*pi*f)^2 * x
What is the formula for displacement? A * cos(2*pi*f*t)
What is the formula for velocity? plus or minus 2 times pi times f times the square root of A squared minus x squared
What is the formula for maximum speed? 2*pi*f*A
What indicates reliability? How close the points are to the line of best fit. How close repeat values are.
What is uncertainty? Half the range
What is percentage uncertainty? half the range divided by the average value then multiplied by 100
What is the percentage uncertainty of AB? The two percentage uncertainties added together
What is the percentage uncertainty of A cubed? 3 times the percentage uncertainty of A
Define error The difference between a measurement and its accepted value (the most accurate value)
Define precision The degree of exactness
Define precision of an instrument The smallest non-zero reading the instrument can measure
What is the precision of a vernier calliper? 0.1mm
When asked to plot ? against ? which is on the y axis? the first one
Created by: sami.lo