Oscillations 5.0 / 5 based on 2 ratings ? PhysicsSimple harmonic motionA2/A-levelEdexcel Created by: chalky-nerdCreated on: 04-12-20 21:04 What is simple harmonic motion? Periodic motion about an equilibrium position, whereby acceleration is proportional to displacement and acts towards equilibrium position. 1 of 19 What is a free oscillation? Frequency of system is natural frequency. 2 of 19 What is a forced oscillation? Force is applied continuously to the system. The frequency is that of the vibration force. 3 of 19 When displacement is 0, what is velocity and acceleration? Velocity is maximum, acceleration is 0 4 of 19 When velocity is 0, what is displacement and acceleration? Acceleration is maximum, displacement is maximum 5 of 19 When acceleration is 0, what is velocity and displacement? Velocity is maximum, displacement is 0 6 of 19 Time period for a mass-spring system oscillating 2π√m/k 7 of 19 Time period for a pendulum system oscillating 2π√l/g 8 of 19 Natural frequency = 1/T 9 of 19 Where is kinetic energy maximum? When displacement is 0 10 of 19 Where is potential energy maximum? When displacement is maximum 11 of 19 What is damping? Occurs when energy is transferred out of a system resulting in reduced amplitude 12 of 19 What is light damping? When oscillations are reduced slowly 13 of 19 What is critical damping? When oscillations are stopped in the quickest time possible 14 of 19 What is overdamping? When amplitude is reduced to 0 within one oscillation 15 of 19 What is resonance? Occurs when the frequency of a system is forced to be equal to the natural frequency of the system 16 of 19 What happens when resonance occurs? Rate of energy transfer is maximum, driving force is π/2 out of phase and ahead of oscillations, amplitude is maximum 17 of 19 How does damping affect resonance? Damping decreases the effect of resonance, and causes the natural frequency to decrease 18 of 19 Why are ductile materials used for damping? They can undergo significant plastic deformation before breaking. Therefore it can absorb energy when being deformed. 19 of 19
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