Ch. 13 Waves and Vibrations

any motion that repeats itself over same distance

any type of motion that repeats itself along the same path b/c of restoring force potential to its displacement

wiggle in time only (back and forth)

number of cycles per unit of time

time for one cycle

one single vibration that moves through medium

many pulses together that move through medium

a pictorial representation of a wave

high point of sine wave

low point on sine wave

at rest or mid point position

max displacement from equilibrium (measures strength of wave)

distance between two identical successive parts of a wave

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

wave that needs a medium (water, sound)

wave that doesn’t need medium (light)

disturbance moves perpendicular to wave motion

disturbance moves in the same direction as wave motion

area of high pressure

area of low pressure

motion of both transverse and longitudinal waves

when 2 waves try to occupy the same point, displacement of medium is sum of displacement caused by individual wave

2+ waves try to occupy same point in space at same time, interfere but no affect on one another

when similar parts of wave arrive together ( 2 crests/troughs)

when opposite parts of wave arrive together ( 1 crest/trough)

waves arrive in phase and interfere resulting in a wave of increased amplitude

wave arrive out of phase and interfere resulting in wave with decreased amplitude

when 2 identical waves moving in opposite directions of each other interfere

parts of wave that don’t appear to move

parts of wave that moves a lot

decreases amplitude of the mass over time

slowly decreases amplitude while continuing to oscillate

may not return to equilibrium position for quite some time without oscillating

returns to equilibrium position very quickly without excessive oscillations

includes a driving force that matches the natural vibration and would increase the amplitude