1. Speed a measure of how fast something moves,
the distance it moves, in a given amount of time
Formula:
in physics, we use the units of meters/second
Speed = distance
time
00:00. 4 5 3 1 2 6
What is the ball’s speed?
6 meters

2. Interesting Speeds meters/second miles/hour Cockroach Kangaroo Cheetah
1.25
2.8
Kangaroo 15 34
Cheetah 27 60
Sound
(in 200C air)
343
767
Space Shuttle
(getting into orbit)
7,823
17,500
Light
300,000,000
671,080,888

3. Warm up day 15 On the white board: Solve for x 10=5x Now- Solve for s
d=st
10=x 5
solve for d
s= d t

4. Solve for x
10=5 x
Solve for t
s=d t

5. Warm up Day 14. On half sheet
If you walk for 1.5 hours and travel 7.5 km, what is your average speed?
2. Calculate the speed of a bee that flies 22 meters in 2 seconds.
S = d t
7.5 km
5 km hr
S = =
1.5 hr
22 m
11 m
sec
S = d t
S = =
2 sec

6. Practice rearrange formulas
speed=distance/time
1. How fast are you going if you cover 13meters in 4seconds?
2. How far will you go if you travel at a speed of 6meters/second for 0.75seconds
3. How long will it take you to travel 5meters at a speed of 3meters per second?

7. Practice How far have you gone if you travel 13hrs at 75miles/hour?
How long will it take you to travel 120 miles at 75miles/hour?

8. Assignment:
1. Calculate your speed for every time and distance that you have from yesterday.
2. Convert each speed that you get from meters/second to miles/hour using the example on the board to help you.