Oscillations 0.0 / 5 ? PhysicsOscillationsA2/A-levelOCR Created by: gelatinousCreated on: 20-02-17 21:23 What is displacement? The distance from equilibrium 1 of 21 What is amplitude? The maximum displacement from equilibrium 2 of 21 What is a period? The time taken to complete a full oscillation 3 of 21 What is frequency? The number of complete oscillations per unit time 4 of 21 What is the equation for angular frequency? w= 2π/T 5 of 21 What is the equation for acceleration in SHM? a= -w^2x 6 of 21 What is simple harmonic motion? Oscillating motion for which the acceleration of the object is directly proportional to its displacement and directed towards a fixed point 7 of 21 What direction does acceleration act? Opposite to the displacement 8 of 21 Does the period depend on the amplitude? No, it is independent 9 of 21 What is an isochronous oscillator? One where the period is independent of the amplitude 10 of 21 What shape does a graph for displacement against time for an SHM oscillator have? Sinusoidal 11 of 21 What equations are used for displacement? x= Acoswt or Asinwt 12 of 21 What is the equation for velocity of a simple harmonic oscillator? v= w(A^2-x^2)^1/2 13 of 21 What is the equation for maximum velocity? v= wA 14 of 21 When is an oscillator damped? When an external force reduces the amplitude of its oscillations 15 of 21 What is a free oscillation? When a mechanical system is allowed to oscillated without any external forces 16 of 21 What is the frequency of free oscillation? The natural frequency 17 of 21 What is a forced oscillation? When a periodic driver force is applied to the oscillator 18 of 21 What is the frequency of a forced oscillation? The driving frequency 19 of 21 What happens when the driving frequency is equal to the natural frequency? The object will resonate 20 of 21 What happens as the amount of damping increases? The amplitude of vibration decreases, the maximum amplitude occurs at a lower frequency than natural, and the peak on the graph becomes flatter 21 of 21
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