Summary Edexcel A Level Physics Student Book 2 - Unit 13 - Oscillations

Oscillations

, ① Simple Harmonic Motion

·
An oscillation is a repeated motion about the object's equilibrium
position

·
An object experiencing simple harmonic motion is one which experiences a



force which acts towards the of
restoring equilibrium
centre -
,




Conditions required for SHM

1) Force and acceleration are
proportional to the object's displacement

from the equilibrium position
2) Acceleration and force are directed towards the equilibrium position .




F: restoring force
F -
= kx ↑= distance from equilibrium
k = constant




·
Acceleration & displacement in opposite direction :


a: acceleration

a -
= wax W = angular speed




·



Angular speed (w) is the angle an object moves through per unit time .

-:
frequency
" W = If or
we ↳ T : time period Unit : rads
-