1. 5*1 Sounds in vibrating strings
WDYS??? (p484) .
WDYT???
Guitarists make different sounds by _____.
The “air guitarist” makes a HIGH PITCH note by _____.

2. 5*1 Investigate (p484)
Set up materials: Pully, 500g mass, String, Plastic Cup, and Clamp
Draw the picture
Measured LENGTH of VIBRATING string:_____ Pluck the string and listen to the sound at the cup-opening, is it HIGH or LOW in pitch?

3. 5*1 Investigate (p484)
***Mass is constant at 500g*** 4 b) The pitch becomes _____ as the length of the vibrating string gets SHORTER
Length of String
Pitch (Low, Medium, High) 1. 2. 3. 4.

4. 5*1 Investigate (p484)
5. ***Length is constant at _____*** 6b) As the tension of the string is increased, the pitch of the vibrating string _____.
Mass on Pully
Pitch (Low, Medium, High) g 1. g 2. g 3. g 4.

5. 5*1 physics talk (p486) “changing the pitch”
To produce a sound, something must vibrate
In the Investigate, we studied 2 variables, length and tension
Pitch  how HIGH or LOW a note is
Shorter string = _____ pitch
Longer string = _____ pitch
***Therefore, change is length = change in pitch***

6. 5*1 physics talk (p486) “changing the pitch”
Adding mass to the string, increased the tension
Less mass = Less tension = _____ pitch
More mass = More tension =_____ pitch
HIGH Pitch 
Increase the tension
Decrease the length

7. 5*1 Checking up (p487)
The pitch of the sound _____in a string as its tension increased.
Decreasing the length of a string _____ the pitch of the sound produced by an instrument.
Adding mass in the Investigate _____ the tension on the string.
In percussion instruments, sound is produced by _____.

8. Physics to go (p490)
a) You can change the tension in a vibrating string by _____.
b) Increasing the tension _____ the pitch of the sound produced by the string.
a) The string is shortened by _____.
b) Decreasing the length of the string _____ the pitch of the sound.
a) If the tension is _____, the string length should also _____ to keep pitch the same.
b) If the length is _____, the tension should also _____ to keep the pitch the same.

9. Physics to go (p490)
4. a) If the tension was _____ and the length _____ by an equal amount, the pitch would change. 5. a) The guitarist plays different notes by _____. b) For both instruments, the pitch is adjusted by changing the _____. 6. a) These knobs are used to change the _____. b) Increasing the tension _____ the pitch, while decreasing the tension _____ the pitch.