Announcements Agenda Do Now 5 min Announcements 2

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Announcements

Announcements

Agenda Do Now 5 min Announcements 2 min Position vs. Time C-Notes 8 min

Agenda Do Now 5 min Announcements 2 min Position vs. Time C-Notes 8 min Work it Out! 20 min Exit Ticket 10 min

Position vs. Time Graphs What is in a position vs. time graph? X-axis: time

Position vs. Time Graphs What is in a position vs. time graph? X-axis: time (s) that the object is in motion Y-axis: position (m) of the object in motion Position (m) Position vs. Time -3 40 30 20 10 0 2 7 Time (s) 12 SLOPE of the line = velocity!

How to Find Slope = rise = Δy run Δx = How much your

How to Find Slope = rise = Δy run Δx = How much your position is changing How much your time is changing

Position vs. Time Position (m) 40 30 20 10 0 0 2 4 6

Position vs. Time Position (m) 40 30 20 10 0 0 2 4 6 8 10 Time (s) 20 40 12

Position vs. Time Position (m) 40 30 20 10 0 0 2 4 6

Position vs. Time Position (m) 40 30 20 10 0 0 2 4 6 8 10 12 Time (s) What is the velocity between t = 0 and t = 4? Slope = Δy/Δx Slope = 20 m/4 s = 5 m/s

Position vs. Time Position (m) 40 30 20 10 0 0 2 4 6

Position vs. Time Position (m) 40 30 20 10 0 0 2 4 6 8 10 12 Time (s) What is the velocity between t =4 and t = 6? Slope = Δy/Δx Slope = 0 m/2 s = 0 m/s When an object is at rest, its velocity = 0 so slope = 0

Position vs. Time Position (m) 40 30 20 10 0 0 2 4 6

Position vs. Time Position (m) 40 30 20 10 0 0 2 4 6 8 10 12 Time (s) What is the velocity between t = 6 and t = 8? Slope = Δy/Δx Slope = 20 m/2 s = 10 m/s

Position vs. Time Position (m) 40 30 20 10 0 0 2 4 6

Position vs. Time Position (m) 40 30 20 10 0 0 2 4 6 8 10 12 Time (s) What is the velocity between t = 8 and t = 12? Slope = Δy/Δx Slope = -20 m/4 s = -5 m/s Negative velocity means…?

The steeper the line, the higher the velocity = faster the object is moving

The steeper the line, the higher the velocity = faster the object is moving Position vs. Time Position (m) 40 30 20 10 0 0 2 4 6 8 10 Time (s) 20 40 12

The steeper the line, the higher the velocity = faster the object is moving

The steeper the line, the higher the velocity = faster the object is moving

Work it Out! Work with your elbow partner to answer the questions on the

Work it Out! Work with your elbow partner to answer the questions on the back of your C-Notes Whatever you do not finish is for homework

Exit Ticket Chicharito Beckham 100 Ronaldo Position (m) 80 80 60 60 40 40

Exit Ticket Chicharito Beckham 100 Ronaldo Position (m) 80 80 60 60 40 40 20 20 00 00 0 16 222 18 444 666 10 12 14 16 18 18 888 10 10 12 12 14 14 16 Time (s) Look at the graph. It shows how 3 runners ran a 100 -meter race. 1. Which runner won the race? 2. Which runner stopped for a rest? 3. How long did he stop to rest? 4. How long did Ronaldo take to complete the race? 5. What is Chicharito’s average speed?