Simple Harmonic Motion 3.5 / 5 based on 4 ratings ? PhysicsSimple harmonic motionA2/A-levelAQA Created by: LZ95Created on: 17-04-14 16:40 Name 3 examples of simple harmonic motion Pendulum bob moving to and fro, object on a spring moving up and down, boat rocking side to side 1 of 20 When does the displacement of an object moving in simple harmonic motion increase? When the object moves away from equilibrium position 2 of 20 What is amplitude? Max displacement away from equilibrium 3 of 20 What is meant by free oscillations? When an object oscillated with constant amplitude since there are no frictional forces acting on it 4 of 20 What is angular frequency (w)? 2pi/T 5 of 20 When is velocity the greatest? When the displacement is 0 6 of 20 When is velocity zero? When the displacement is at its maximum 7 of 20 When is acceleration the greatest? When the velocity is 0 and displacement is max. in the opposite direction 8 of 20 When is the acceleration 0? When velocity is at its maximum and the displacement is 0 9 of 20 Define simple harmonic motion SHM = oscillating motion in which the acceleration is proportional to the displacement and is in the opposite direction to the displacement 10 of 20 In which direction does the resultant force act in an oscillating objects? Towards the equilibrium position 11 of 20 What is the spring constant for springs in series and in parallel? Series: k/2 Parallel: 2k 12 of 20 When is there max tension in the springs? When the springs are stretched as much as possible 13 of 20 When is there min tension in the springs? When the springs are stretched as little as possible 14 of 20 When is kinetic energy the highest in SHM? At equilibrium 15 of 20 When is potential energy the highest in SHM? At max. displacement 16 of 20 Define dissipative forces Forces that cause amplitude to decrease because they dissipate the energy of the system to the surroundings as heat energy 17 of 20 What is light damping? Damping that gradually decrease the amplitude by the same fraction each cycle 18 of 20 What is critical damping? Damping that returns the object to equilibrium as quickly as possible without overshooting 19 of 20 What is heavy damping? Damping that is so heavy that it takes a very long time to return to equilibrium and no oscillating motion occurs 20 of 20
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