1. Speed, Distance, Time Calculations

2. You Need: Colored PencilsScience Notebook Science Folder Everything else goes into the back. Start a new page in your notebook. Title it “Speed” What is speed? How do you think scientists define it? If you were to put speed into an equation what would it look like? Speed = ____________

3. Speed is how fast something is going or the distance something moves in a given amount of time. Speed = distance ---------- time

4. Speed is measured in miles per hour Speed is also measured in kilometers per hour MeasurementUnit SpeedMiles/Hour or Km/Hour DistanceMiles/Kilometers TimeHours

5. Jack runs around the 1 mile track in 7 minutes. What is his speed? - Speed is measured here in miles/hour - How do we get 7 minutes into hours? - 7 minutes1 hour 60 minutes 7/60 =.12 hours

6. 15 mins = _____ Hours.25 Hours

7. 30 minutes = _____ hours.5 hours

8. 3 hours 45 minutes = _____ hours 3.75 Hours

9. D S T

10. The 3 formulas for Speed, Time & Distance: Speed = Distance Time Time = Distance Speed Distance =Speed xTime Remember them from this triangle: D ST Solving for SpeedSolving for TimeSolving for Distance

11. D ST A windsurfer travelled 28 km in 1 hour 45 mins. Calculate his speed. Speed = Distance Time 28 1.75 = = 16 km/h 1 hour 45 mins Answer: His speed was 16 km / hour

12. 2 hour 30 mins Answer: He travelled 125 km A salesman travelled at an average speed of 50 km/h for 2 hours 30 mins. How far did he travel? D ST Distance = Speed x Time = 50 x 25 = 125 km

13. Answer: It took 9 hours 15 minutes A train travelled 555 miles at an average speed of 60 mph. How long did the journey take? D ST Time = Distance Speed 555 60 = = 925 hours= 9 hours 15 mins

14. Your dad traveled 75 miles in 2.5 hours. What was his speed? 30 miles/hour Write your equation Change your units Fill in the info you know Solve Write proper units, circle your answer

15. Yolanda travels 240 kilometers in 4 hours. What was her average speed? 60 miles/hour Write your equation Change your units Fill in the info you know Solve Write proper units, circle your answer

16. Mikes speed was 20 km/hour. He traveled for 10 hours. How many kilometers did he drive? 200 kilometers Write your equation Change your units Fill in the info you know Solve Write proper units, circle your answer