17 - Oscillations

Question 1

simple harmonic motion is an oscillating motion where the…

Answer 1

acceleration is proportional to displacement
always in opposite direction to displacement

a∝-w^2x

Question 2

x=Asinwt

Answer 2

v=dx/dt = wAcoswt
max V when coswt = 1
max v =wA
max v = 2πfA

Question 3

a=-w^2x , what is max a

Answer 3

max a when x is max amplitude
so a max = -w^2A

Question 4

resonance is

Answer 4

the tendency of a system to oscillate with a larger amplitude at some frequencies than at others

this frequency is the resonant frequency

Question 5

at resonance =

Answer 5

natural frequency of system is equal to the applied frequency of the periodic force (in phase)

Question 6

what does damping decrease (graph)

Answer 6

the amplitude and natural frequency of vibration

Question 7

natural frequency

Answer 7

frequency of a system oscillating without external periodic force

Question 8

periodic force

Answer 8

force with regularly changing amplitude and definite time period

Question 9

forced oscillation

Answer 9

oscillation under external periodic force