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17 Oscillations
17.1 Simple harmonic oscillations
Candidates should be able to:
1 understand and use the terms displacement, amplitude, period, frequency, angular frequency and
phase difference in the context of oscillations, and express the period in terms of both frequency and
angular frequency
2 understand that simple harmonic motion occurs when acceleration is proportional to displacement
from a fixed point and in the opposite direction
3 use a = –ω2
x and recall and use, as a solution to this equation, x = x0 sin ωt
4 use the equations v = v0 cos ωt and v = ±ω ( ) x x 0
2 2 −
5 analyse and interpret graphical representations of the variations of displacement, velocity and
acceleration for simple harmonic motion
17.2 Energy in simple harmonic motion
Candidates should be able to:
1 describe the interchange between kinetic and potential energy during simple harmonic