Studied by 17 people
periodic motion
any motion that repeats itself over same distance
simple harmonic motion
any type of motion that repeats itself along the same path b/c of restoring force potential to its displacement
vibration
wiggle in time only (back and forth)
frequency
number of cycles per unit of time
period
time for one cycle
pulse
one single vibration that moves through medium
wave
many pulses together that move through medium
sine wave
a pictorial representation of a wave
crest
high point of sine wave
trough
low point on sine wave
equilibrium
at rest or mid point position
amplitude
max displacement from equilibrium (measures strength of wave)
wavelength
distance between two identical successive parts of a wave
medium
what the wave is traveling through
speed a wave travels depends on the medium
only energy of wave is transported from one point to another, not medium
mechanical wave
wave that needs a medium (water, sound)
electromagnetic wave
wave that doesn’t need medium (light)
transverse
disturbance moves perpendicular to wave motion
longitudinal
disturbance moves in the same direction as wave motion
compression
area of high pressure
rarefaction
area of low pressure
surface wave
motion of both transverse and longitudinal waves
principle of superposition
when 2 waves try to occupy the same point, displacement of medium is sum of displacement caused by individual wave
interference
2+ waves try to occupy same point in space at same time, interfere but no affect on one another
in phase
when similar parts of wave arrive together ( 2 crests/troughs)
out of phase
when opposite parts of wave arrive together ( 1 crest/trough)
constructive
waves arrive in phase and interfere resulting in a wave of increased amplitude
destructive
wave arrive out of phase and interfere resulting in wave with decreased amplitude
standing wave
when 2 identical waves moving in opposite directions of each other interfere
nodes
parts of wave that don’t appear to move
anti-node
parts of wave that moves a lot
damped harmonic motion
decreases amplitude of the mass over time
under-damped
slowly decreases amplitude while continuing to oscillate
over-damped
may not return to equilibrium position for quite some time without oscillating
critically damped
returns to equilibrium position very quickly without excessive oscillations
resonance
includes a driving force that matches the natural vibration and would increase the amplitude
Note 
Flashcard (90)