1. Speed 9/20/13 5 Practice: Calculate the speed of the following objects (show your work): Racecar: Space Shuttle: Fire Truck Calculating Speed- Speed is a function of distance and time The Magic Triangle!!! **Solve for the missing variable **Speed can also be measured in intervals of distance or time My role in the Speed Challenge is: Do Now: A car leaves Minneapolis heading Southbound towards New Orleans at 5PM on a Friday. The car averages a speed of 110km/hr. The car arrives at 11AM Saturday morning. What is the distance between Minneapolis and New Orleans? Show your work. Write answer in a sentence. Speed is a scalar quantity—quantity that is fully described by magnitude alone Speed Problems: When an object moves at a fixed rate, it is moving at a constant speed Instantaneous speed shows speed at a given moment in time

2. Velocity and Acceleration9/24/13 6 Vector quantities—quantities fully described by both magnitude and direction Do Now: If a runner is traveling North at 7 km/hr and there is a 12 km/hr wind that is blowing North at the same time, do you think the runner is moving faster, slower or at the same rate due to the wind? Explain your answer in detail. *represented by an arrow showing direction and magnitude 5 units right10 units left Acceleration can be both positive and negative (deceleration) Practice with Vectors Reflection Write a word problem that involves combining velocities. Write the problem and then include a drawing with vectors that includes the details from the word problem.

3. Interpreting Graphs 09/27/12 Object is not moving because the distance isn’t changing (line is flat) Moving back to the origin or reference point Speed is changing because the line is not straight Increasing speed because the line is getting steeper Decreasing speed because the line is getting flatter 7 Brain Jog What about science really interests you? What do you find fascinating about the world? About the Universe? What do you want to learn about in this class that will help fuel your curiosity? Moving at a constant speed because the line is straight Reflection Create your own story from a GRAPH!!