Announcements Agenda Do Now 5 min Announcements 2
- Slides: 13
Announcements
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 (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 position is changing How much your time is changing
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 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 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 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 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 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
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 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?