Test Friday (Safety and Collisions) To the back of the room: -Determine your Mass off egg and compartment -choose a spokesperson to explain your design -have your rubric out for official grades -Typed components level 3 will be accepted no later than tomorrow morning.

warm upNumber your paper from Mass 2. Time 3. Energy 4. Acceleration 5. Force 6. Applied Force 7. Work 8. Velocity 9. Net Force 10. Frictional force 11. Kinetic Energy 12. Force of weight 13. Gravitational Potential Energy 14. Acceleration 15. Acceleration due to gravity 16. Inertia 17. momentum 18. Pressure 19. Elastic Potential Energy

Content Objective: SW be introduced to Big Idea #5 for the class, and brainstorm ideas which can be used to evaluate “Entertainment Value” for Chapter Challenges. Language Objective: We will know the objective was met when we can come to consensus on what will be needed in order to develop and present a quality chapter challenge.

Big Idea #5 The Properties of Sound and Light Demonstrate Wave Behavior

Let Us Entertain You Chapter Challenge pg 480 Brain Storm: What are the qualities of an Entertaining Presentation?

Pre test Waves and Energy

A toy train with a mass of 1.0 kg coasting at.5m/s overtakes and collides with a.25 kg cart moving the same direction at.3 m/s. When they collide they lock and continue forward. 1)Draw before and after momentum diagrams. 2)Is this elastic or inelastic? 3)What is the final speed of the carts?

Collect Projects What’s on the test?

Content / Language Objective: SW Investigate the variables which influence the pitch of a vibrating string, being able to write an explanation on how to change the pitch of a stringed instrument, using words learned during the investigation.

Chapter 5, Section 1 Sounds in Vibrating Strings Pg 484 What do You See? What do You Think?

Homework: due Monday Read PT pg 486 CU pg 487 #4 PTG pg 490 #2,3,6 Honors: Include APP pg 488 #1-4

Investigate: Read as class Copy the data table on page 485 Team reader and other members: Quietly read steps #1-4 Material Specalists: Meet me in the back Once your set-up go to step #3 -Clamp-cup -Pulley-string - 500g mass-meter stick ## minutes # minutes (3 more masses)

In your Journal: Frequency: Number of vibrations (cycles) occurring per second. Units: waves/s cycles/s 1/s Hz

In your Journals, draw the following graphs: f Tension f L Draw what you think the curve of each graph would look like. Quadralogue

Crucial Physics Let’s Look at the String Equation! Copy in your Journal f = _T___ 4 mL

Grab a white board and marker

White board challenge #1 in your groups, place the units for each variable in the equation and solve for the units for frequency: T = kg. m/s 2 m = kg L = m f = _T___ 4 mL Class share, What are the units for frequency?

White board challenge #2 Now, looking at the equation, with your white board group, predict what you think a Tension vs frequency and Length vs frequency graph would look like f = _T___ 4 mL Class share

Pass out graph paper and fold in half f Tension vs frequency T f Length vs frequency L

On your own, make the following table and using the equation, solve for “f” make m = 1, L=1: T f___ f = _T___ 4 mL Graph it!

On your own, make the following table and using the equation, solve for “f” make T = 4 and m=1: L f___ f = _T___ 4 mL Graph it!

You do: Next to each graph you just drew, explain the relationship between the two variables: Stem #1: As tension increases, frequency …………………… Stem #2: As length increases, frequency …………………… Tape / staple into your journal

You do In your Journal, write a summary explaining how length and tension effect frequency of a vibrating string

Do now: 1.Which of the following statements describes the relationship between the pitch heard and the vibration rate of a string under tension? a) As the vibration rate increases, the pitch increases. b) As the vibration rate decreases, the pitch increases. c) As the vibration rate increases, the pitch decreases. d) The vibration rate and the pitch heard are not related to each other. 2.Which of the following are the units for Frequency? vibrations / scycles / sHz1/swaves / s