Flashcards
Simple Harmonic Motion
Cards in this deck (23)
- 1Define simple harmonic motionosscilation in which acceleration of the object is directly proportional to its displacement from the midpoint, directed to the midpoint
- 2How does energy change through simple harmonic motion?max gpe converts to ke
max ke converts to gpe
to mak gpe and repeats
some enrgy lost to surroundings - 3What is the sum of the potential and kinetic energy called?The mechanical energy which stays constant
- 4What does the graph of displacement against T look like ?
- 5What does the graph of velocity against T look like?
- 6What does the graph of acceleration against T look like?
- 7What do frequency and period not depend on?Amplitude
- 8What is a free vibration and what does it mean?No transfer of energy to and from the surroundings
If you pulled a sping it would keep on oscillating with the same amplitude forever - 9What is a spring vibrating in the air called?A free Vibration
- 10When do forced vibrations happen ?When theres an external force
- 11What is the frequency of a forced virbration called?The driving frequency
- 12When does resonance happen?When the driving frequecy= the natural frequency
- 13What happens when a system is resonating?The system gains more energy from the driving force and vibrates with a rapidly increasing amplitude
- 14When does damping happen?When energy is lost to the surroundings
- 15Why are some systems deliberatley damped?to stop them osscilating or to minimise the effect of resonance
- 16What are the four types of damping?Light damping,heavy damping,critical damping and overdamping
- 17What does damping reduce?The amplitude of the oscilation over time
- 18The heavier damping the...quiker the amplitude is reduced to zero
- 19Which type of amplitude reduces the amplitude in the shortest possible time?Critical damping
- 20When a system is overdamped what happens?It takes longer to return to equilibrium
- 21What does damping also effect?resonance
- 22Lightly damped systems have a ...very sharp resonance peak
- 23Heavily damped systems...Have a latter resonance peak
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- Physics Unit 4 Flashcards on Simple Harmonic Motion, created by sammy414 on 05/12/2013.
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- sammy414
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