**Put your x-t practice on your desk** Bell Work: Position Time Graphs What does the slope represent? What does a steep line tell you about the motion? What does a horizontal line tell you about the motion? What does a curved line tell you about the motion? What unit do velocity and speed have?

Today: Constant Speed and Accelerated Motion Problems Complete Literacy Paragraph (5th and 6th) Complete analysis and conclusions for the car vs. person lab; due tomorrow (Friday) at the beginning of class.

Writing a Paragraph Which game could you win? Why? Include some physics in your answer. Topic sentence, back it up with 3+ facts, summarize in a closing sentence. HONORS CREDIT: With a partner or by yourself, come up with your own midway game – draw a picture and describe how to win. Create your game and bring it in so we can play it. Describe to the class the physics behind your game.

Constant Speed and Accelerated Motion Problems: How is a constant velocity different from accelerated motion? Identifying variables. Choosing an equation. Using the guess method to work problems.

Identifying variables Use the units! Meters measure __________ Seconds measure ___________ m/s measure ______________ m/s2 measure _____________ Use context clues in the problem. . . . . . traveled a distance of -45 m . . . . . . . . .accelerated at a rate of -8.5 m/s2. . . . . . . . . .moving at a speed of -23 m/s . . . .

Choosing an equation Today: Decide if it is moving at a constant speed or accelerating. Constant Speed use v = x/t Accelerating use a = v/t

Using the guess method to work problems. Given Unknown Equation Substitution Solve