SHM Basics
Period.
Figuring Out Forces
Understanding Graphs
Miscellaneous
100
What acts as the restoring force for a pendulum?
Gravity (the component that acts parallel to the motion)
100
A simple harmonic oscillator takes 4.8 s to undergo five complete oscillations. What is the period (T) of 1 cycle?
0.96 s
100
What is the spring force on a 0.012-kg mass stretched +8 cm on a horizontal spring with k=5.4 N/m?
-0.432 N
100
What is the period of this oscillation?
2 s
100
What are the two main Simple Harmonic Oscillators we talked about?
Pendulums
Masses on Springs
200
Give a real-world example of a pendulum.
Clock, metronome, swing, other??
200
How long is a pendulum that has a period of 3 s?
2.23 m
200
What are the two requirements for a force to be a restoring force?
Opposite direction of displacement (toward equilibrium)
Directly proportional to displacement
200
Where is this object moving the fastest?
At equilibrium (t=0.5, 1.5, 2.5, 3.5)
200
How are period and frequency related? (What is the equation)
Inverse relationship: T=1/f and f=1/T
300
Where does a mass-spring system have the most elastic potential energy?
At its maximum displacement
300
How much mass is attached to a spring with a spring constant of 35 N/m that oscillates 2.5 times per second.
0.14 kg (140 g)
300
What is the mass hanging from a pendulum that has a restoring force with a magnitude of 0.5 N when it is at an angle of 8 degrees away from equilibrium?
0.367 kg (367 g)
300
20 N/m
300
What is the displacement at equilibrium?
zero
400
What causes simple harmonic motion?
A restoring force
400
If the spring constant is doubled, how is the period of a mass-spring system affected?
Divided by the square root of 2
400
What is the net force on a simple harmonic oscillator at its equilibrium position?
zero
400
If this is the graph for a mass on a spring, where is the elastic potential energy the greatest?
At the maximum displacement (t=0, 1, 2)
400
How does the amplitude of an oscillator affect its period and restoring force?
It doesn't
500
Where does a simple harmonic oscillator have the greatest acceleration?
At the maximum displacement
500
If a pendulum is moved from Earth to Saturn, how would its period change? (Stay the same, increase, or decrease)
Decrease
500
Use Hooke's Law to find the spring constant of a spring that exerts a force of -4 N when a mass (attached) is pulled 32 cm to the right.
12.5 N/m
500
What is this graph showing for a system undergoing SHM that starts at its maximum displacement? (displacement, velocity, or acceleration?)
velocity
500
What is this?
A simple harmonic(a)