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Speed a measure of how fast something moves,

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Presentation on theme: "Speed a measure of how fast something moves,"— Presentation transcript:

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.


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