L’Oscillation Flashcards

1
Q

Define Simple harmonic motion

A

Motion of particle abt fixed pt such that its accelerat n is proportional to its displacement from the fixed pt, and directed towards the pt/opp. in direct n to displacement

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2
Q

What are the types of damping

A
  • Light
  • Critical
  • Heavy
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3
Q

What is resonance? What happens?

A

When driving f is equal to natural f of oscillat n of system, amplitude of oscillat n reach maximum

Max transfer of energy per unit time from driver to oscillating system, giving a max amplitude of vibration

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4
Q

What is meant by damping?

A

Dissipation of energy of oscillator bcos of resistive forces

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5
Q

What is natural frequency?

A

f at which oscillator oscillates when oscillating freely in absence of external driving force

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6
Q

What is critical damping?

A

A system is critically damped if it returns to eqm pos n w/o oscillat n in minimum time

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7
Q

When is damping unfavourable?

A

Damping of pendulum bob’s oscillation

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8
Q

How to alter degree of damping?

A
  • Change viscosity of liquid (eg for submerged pendulum bobs)
  • Change size/shape of pendulum bobs
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