1. 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?

2. CLO: 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.

3. Physics Journals Date Table of contents page # 11/19The mu of the shoe ? 11/3Work / Energy / Power ? 12/11Momentum and Impulse ? Semester 2 1/7Conservation of Momentum? 1/14Sounds in Vibrating Strings?

4. Per 2: The following people didn’t turn in last week’s homework please meet with me to show proficiency on LOCOP Jamal Ivan Evelyn Colin Oliver David Justin Emily Agassi Elise Allison Micah

5. Chapter 5, Section 1 Sounds in Vibrating Strings Pg 484 Air Guitar try-outs

6. Homework: due Tue or Wed if not completed today Read PT pg 486 PTG pg 490 #2,3,6 Honors: Include APP pg 488 #1-3

7. Investigate: Read Investigate pg 484 By the end of this investigation, have your 2 data tables filled in and answer the questions as you go Team reader and other members: Materials: -Clamp-cup -Pulley-string - 500g mass-meter stick This should take about 20 minutes max.

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

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

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

11. Grab a white board and marker

12. 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?

13. 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

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

15. On your own, make the following table and using the equation, solve for “f” make m = 1, L=1: T f___ 4 8 12 16 20 f = _T___ 4 mL Graph it!

16. On your own, make the following table and using the equation, solve for “f” make T = 4 and m=?: (if you double the length, what happens to the mass?) L _m_ f___ 1 2 3 4 5 f = _T___ 4 mL Graph it!

17. 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 …………………… Pass in graph paper

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