• Slides: 9

Date: Dec 16, 2014 Page: Table of Contents p. 1 W. O. D: Last 5 pages Warm-ups: Front Cover W. O. D. Initial – first, starting, primary. Question: What is the initial velocity of a car at a red light, heading north on Lyndale?

Today’s plan • • • Warm- up Breathe Speed practice problems Distance/Time graphing - together Finish questions from “Read about Speed” Physical Science text book. p. 118 -123 • Start Domino Derby • Reflect

Table of Contents p. 1 • • Rube Goldberg Machine Drawing p. 2 SI units/Webquest p. 3 Metric Lab p. 4 Text reading on Speed p. 5 Metric Ladder p. 6 Metric Ladder questions p. 7 Speed notes/d/t Graph p. 8

Practice problems 1. What is the speed of a basketball that travels 50 meters in 2. 5 seconds? 2. Which is faster, a kid rolling down a hill at 3 meters in 6 seconds, or a frog hopping 5 meters in 2 seconds? 3. You need to be to your friends at 5: 00 pm, and they live 4000 meters away. If you travel at 10 m/s, when do you need to leave?

Speed Reading SNB p. 5 • Complete reading in Physical Science text book. p. 118 -123 • Do reading checks as you read (label as reading check #1, reading check #2, etc). • Complete questions 1 -7 from page 123 • Extend: Go to p. 142 -143. Do ? ’s 6, 10, 11, 14, 17, 18, 19,

Domino Derby 1. Set up 25 equally spaced dominoes in a straight line. 2. Use a meter stick to measure the total length of the row of dominoes, and record the length. 3. Use a stopwatch to measure how long it takes the dominoes to fall. 4. Predict what would happen if the distance between the dominoes changed. 5. Test your prediction.

Graphing your Speed Lab • Include a title, X & Y axis labels, and units of measurement • Choose 3 colors to represent your 3 different trials • Create a key for the 3 colors 20 km in 1: 16: 43

Reflection (back-side of warm-up sheet) Estimate the average speed of a city bus you take regularly.