Further Mechanics

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What is SHM
Oscillation in which acceleration of an oscillator is directly proportional to the negative of its displacement from the midpoint, and is directed towards the midpoint
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What is mechanical energy and what can cause it to decrease?
Kinetic energy + Potential energy. Damping
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Write down the SHM equations
.
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What is a free vibration
A vibration in which a mass oscillates at its resonant frequency and no energy is transferred to or from its surroundings, with no amplitude reduction - this only really happens in a vacuum
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When are driver and oscillating system in phase?
When driving frequency is significantly smaller than resonant frequency of system
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When are driver and oscillating system completely out of phase?
When driving frequency is significantly greater than resonant frequency of system
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When are driver and oscillator 90° out of phase?
When Resonant frequency equals driving frequency
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What is critical damping?
Damping which reduces amplitude in shortest possible time
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What is overdamping?
When damping is heavier than critical damping but amplitude takes a long time to decrease to zero
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How is damping used in soundproofing?
Soundproofing absorbs sound waves, so you don't get reflected sound waves and stationary waves, which reduce sound quality.
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Other cards in this set

Card 2

Front

What is mechanical energy and what can cause it to decrease?

Back

Kinetic energy + Potential energy. Damping

Card 3

Front

Write down the SHM equations

Back

Preview of the front of card 3

Card 4

Front

What is a free vibration

Back

Preview of the front of card 4

Card 5

Front

When are driver and oscillating system in phase?

Back

Preview of the front of card 5
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