1.) Inertia of rest: The jar of jam in the first photo is not moving and represents the inertia of rest. The object remains at rest unless acted upon. 

2.) Inertia of motion: In the second photo, the jar of jam is in motion due to the force exerted from my hand pushing the jar forward. The jar then starts to accelerate away from my hand and remains in motion unless acted upon.

3.) Inertia of movement that is acted upon: In the third photo, the jar of jam is stopped after being in motion. The jar hits the lamp as it is moving and because the lamp has more mass it prevents any motion from the jar, allowing the jar to come to rest. 

These cars got into an inelastic collision, where the momentum of all objects before the collision equals the momentum of all objects after the collision. Cars use gas to make kinetic energy. And when they collide the crumpling of the metal dissipates the duration of the impact so stopping doesn’t require acceleration.

At some time t, the vertical velocity was equal to zero, due to the fact that there was an acceleration due to gravity of -10m/s2.

Since the velocity function v(t) is differentiable on the interval t ∈ [to,tf ], starting at a positive velocity and ending at a negative velocity, there is a time where the velocity equal to 0m/s.

This picture shows where the vertical velocity of the wallet was (approximately) equal to 0m/s.

-sound waves are longitudinal

-HOWEVER

-music is made with the frequencies of standing waves

-standing wave- result of reflection and interference

-different frequencies=different notes (pitches)

-string has two fixed ends

-cut string in half-  get first harmonic

-cut that in half- get second harmonic 

-so on

-standing wave creates peaks along the string (antinodes) 

-between those peaks there are points standing still (nodes)

-the fixed ends of these strings are both nodes bc they're stuck in one place

-the wave made by the fixed string will have at least two nodes (one at each end) & one antinode (in the middle)

-harmonic- made up of fundamental wave and overtones

-the fundamental wave is the first harmonic

-overtones- built on the fundamental

-each overtone adds a node & antinode

-overtones are higher-numbered harmonics

-air molecules move back and forth in the pipe (my example is a flute) 

-the molecules that oscillate the most form antinodes (open ends of the pipe)

-in between the antinodes are the nodes, where the molecules don’t move (closed ends of the pipe)

-thin string=high pitch

-thick string =low pitch

-high frequency=high pitch

-low frequency=low pitch

-(pitches are measured in hertz btw)

-(my string examples are a cello and a bass)

Guitar strings can be elastic or steel which make them vibrate. Once the guitar is strummed the vibrations turn into sound waves which travel in both directions then come back together

These strings act in a way that can satisfy the relationship between wavelength and frequency which can be represented in the equation f = v/λ. This equation means that the frequency of a wave(f) is dependent on the speed of the wave(v), and the length of the wave. Waves will travel slower on the biggest string (top of sting on guitar) since mass is increased the (v) will decrease.

Frets are the strips of metal that are on the neck of the guitar. The function of the frets is to decrease the length of the strings which will cause a higher frequency. This decreases the length of the sound waves by decreasing the length of the string then increasing the frequency of the string

This guitar is an electric acoustic, meaning it can be played without an amp or with an amp for projection. An amp can control the frequency of the sound sent by the guitar. Changing the frequency can make the sound have a higher or lower pitch. An amp makes the sound louder by recreating the signal and making it stronger when it's sent to the loudspeaker.