# Simple Harmonic Motion

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• Created by: LZ95
• Created 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
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When does the displacement of an object moving in simple harmonic motion increase?
When the object moves away from equilibrium position
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What is amplitude?
Max displacement away from equilibrium
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What is meant by free oscillations?
When an object oscillated with constant amplitude since there are no frictional forces acting on it
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What is angular frequency (w)?
2pi/T
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When is velocity the greatest?
When the displacement is 0
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When is velocity zero?
When the displacement is at its maximum
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When is acceleration the greatest?
When the velocity is 0 and displacement is max. in the opposite direction
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When is the acceleration 0?
When velocity is at its maximum and the displacement is 0
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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
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In which direction does the resultant force act in an oscillating objects?
Towards the equilibrium position
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What is the spring constant for springs in series and in parallel?
Series: k/2 Parallel: 2k
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When is there max tension in the springs?
When the springs are stretched as much as possible
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When is there min tension in the springs?
When the springs are stretched as little as possible
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When is kinetic energy the highest in SHM?
At equilibrium
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When is potential energy the highest in SHM?
At max. displacement
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Define dissipative forces
Forces that cause amplitude to decrease because they dissipate the energy of the system to the surroundings as heat energy
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What is light damping?
Damping that gradually decrease the amplitude by the same fraction each cycle
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What is critical damping?
Damping that returns the object to equilibrium as quickly as possible without overshooting
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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
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## Other cards in this set

### Card 2

#### Front

When does the displacement of an object moving in simple harmonic motion increase?

#### Back

When the object moves away from equilibrium position

### Card 3

#### Front

What is amplitude?

### Card 4

#### Front

What is meant by free oscillations?

### Card 5

#### Front

What is angular frequency (w)?