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PERIODIC MOTION, OSCILLATION OR VIBRATION
a motion that repeat itself…
PERIODIC MOTION
SIMPLE PENDULUM
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The cord does not stretch, andthat its mass is negligible
if the angle is small,sin θ ≈ θ.
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if the damping is small, we can treat it as an,―envelope‖ that modifies the undamped oscillation.
If b 2 > 4mk, ω’ becomes imaginary, and the system is overdamped
For b 2 = 4mk, the system is critically damped,
Forced vibrations occur when there is a periodic, driving force. This force may or may not have thesame period as the natural frequency of the system.
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HOOKE'S LAW
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max potential energy = min kinetic energy,
max kinetic energy = min potential energy
GRAPH SHM
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the greater the dispacement , the larger the restoring force
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at max displacement :v = 0, a is largest,energy is all potential
at equilibrium,v is highest , a= 0,all is kinetic energy
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MAXIMUM DISPLACENT
how far the mass moves from the equilibrium point,(Xmax occurs at A..)
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PERIODIC MOTION
A vibration or oscillation repeat itself over and over the motion is said to be periodic
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