1. An object moves 6m/s for a distance of 42m
An object moves 6m/s for a distance of 42m. How long did the object move for?
A train travels at a speed of 30miles/hr for 5 hours. How far did the train go?

2. SCIENCE 9/24/12
KWBAT Illustrate an object’s motion on a distance time graph

3. Agenda – 45 min Do Now, Please Graphs to show motion?
Tortoise and the hare!
You graph it!

4. Two kinds of speed There are two kinds of speed:
Instantaneous speed—speed at any instant
Average speed—total distance covered divided by the time interval
Your instantaneous speed and average speed will only be the same under what situation?

5. Distance Time graphs
Tell you how far an object travels over a period of time.

6. Distance time graphs
The ____________ is always on the Y axis. It shows how far the object has traveled.
The ____________ is always on the X axis. It shows how much time has passed.

7. Distance Time Graph Example 1
Distance( m)
Time(s) 20 1 50 2
130 3
150 4
200 5

8. Distance time graph example 2
Distance( m)
Time(s) 1
2.5 2 3 4 5
12.5 6 7 8

9. How far away was the object from it’s reference point at 6 seconds
What was the object doing from point M to point N?

10. WATCH THE MOVIE!!!!

11. Story time! Tortoise and the Hare  What happened?
The hare got too cocky and took a nap
The tortoise kept going, slow and steady
In the end tortoise won the race!

12. Let’s see if you understand the graph
Who won the race?
What is the tortoise’s average speed?
What is the hare’s average speed?
What is the hare’s instant speed at 30 seconds?
What is the hare’s instant speed at 10 seconds?
What is the tortoise’s average speed at 20 seconds?

13. Let’s graph this story Go ahead and graph this on your worksheet
Time
Tortoise
Hare 5 3 10 6 15 9 20 12 25 30 18 35 21 40 24 45 27 50 55 33 60 36
Go ahead and graph this on your worksheet
Make two lines, one in each color to make sure you know which one we’re talking about

15. Following directions on the worksheet!!!
Speed swag song