Lesson 28 - Vibrations and Waves
Lesson 29 - Simple Harmonic Motion
Lesson 30 - Hooke's Law
Lesson 31 - Mechanical Waves
Lesson 32 - Wave Interference
100
What is the term for periodic motion that repeats itself over and over in a predictable way?
Simple Harmonic Motion
100
Light and sound are both forms of _______ that travel as waves.
Energy
100
What is the equation for Hooke's Law?
F = kx
100
A mechanical wave needs a ________ to travel through.
Medium
100
True or False: Waves are objects and can bounce off one another.
False
200
What is one cycle of motion called?
The period
200
True or False: The mass of a pendulum affects the period of its swing.
False
200
What are the units for the spring constant k?
Newtons/meters
N/m
200
This type of wave vibrates perpendicular to the direction of the energy flow. 
Transverse
200
What type of interference in shown? 
Constructive
300
What is the unit for period?
T (secs)
300
What is the value (number and units) for the acceleration of gravity on Earth?
9.8m/s2
300
How are the Force (F) and the Displacement (x) related to one another in Hooke's Law?
They are directly proportional. If one increases the other will increase and visa versa.
300
What is compression in a longitudinal wave?
The point where the maximum pressure occurs.
300
What type of interference is shown?
Destructive
400
When a bobblehead in in equilibrium all of the forces acting on it are __________.
Balanced
400
What type of curve or graph represents the motion of a pendulum swing?
A sine curve
400
What does the negative sign tell us in Hooke's Law?
F = -kx
That the spring constant (k) acts in the opposite direction of the force.
400
What are the two types of body waves an Earthquake produces?
P waves and S Waves
400
What does the Principle of Superposition tell us?
That if two waves intersect at the same point, they will experience interference and their amplitudes will either be added or subtracted depending on the type of wave pulse.
500
The distance from the equilibrium to either end of the motion is called the ___________.
Amplitude
500
What is the equation for finding the period of a simple pendulum?
500
Solve the following equation.
What is required to stretch a spring 4 meters? The spring has a constant of 300 n/m.
F = kx
F = 300 x 4 = 1200 N
500
Which type of wave is more destructive, P wave or S wave?
S wave
500
Two wave pulses are heading towards each other. Which number shows what will happen when they intersect?
Number 1