midterm Flashcards
what is period?
duration of a cycle
what is frequency?
how many cycles per unit of time
what is angular frequency? what’s the formula?
W is the number of rads per unit of time. 2pi/T
is acceleration constant in simple harmonic motion?
no
what’s the formula for elastic force? what’s the direction of this force?
f elastic= -KX (always towards equilibrium)
in spring motion, when is V at its max?
when x=o (position at equilibrium)
in spring motion, when is a at its max?
when x=A or -A
What are the different SHM formulas that we can use?
what is the condition for a pendulum motion to be SHM?
the angle must be small (under 10 degrees)
what does pendulum motion depend on?
length of string and gravitational accelerations
what do all waves require?
-a source of disturbance
-a medium to propagate the disturbance
-a mechanism to propagate the disturbance (collisions for sound, tension for string)
What is the pendulum formula for theta and omega?
what is a transverse wave?
-wave travels perpendicular to motion of particles in medium (string with tension)
what is a longitudinal wave?
wave travels parallel to motion of particles in medium (sound)
does a sound wave move faster in warm of cold air?
warm
What is the formula for the position of a wave particle, for a wave travelling in the negative direction (left)?
what happens to vwaveif I change the frequency of a standing wave (by the disturbance)
NOTHING. lambda will simply adapt to the change to assure vwave stays constant
what happens to lambda and frequency if I change the vwave?
lambda adapts? frequency does not change!
what is the wave number (k) equal to ?
2pi/lambda
what does increasing string tension do to a wave?
-makes it travel faster
is vwave faster in water or air?
water
what does vacuum mean?
no air
What happens when a wave meets a clamp?
What happens when a wave meets a massless ring boundary?
