# Speed Distance Time Speed Distance Time Calculations Bell

- Slides: 16

Speed, Distance & Time Speed, Distance, Time Calculations

Bell Work You Need: Colored Pencils Science Folder Science Notebook 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 = ______

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

Units of Speed is measured in miles per hour Speed is also measured in kilometers per hour Measurement Unit Speed Miles/Hour or Km/Hour Distance Miles/Kilometers Time Hours

Wait. . How do we get minutes into hours? 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 minutes 7/60 =. 12 hours 1 hour 60 minutes

You Try 15 mins = _____ Hours . 25 Hours

You Try 30 minutes = _____ hours . 5 hours

You Try 3 hours 45 minutes = _____ hours 3. 75 Hours

3 Formulas D S T

The 3 formulas for Speed, Time & Distance: Speed = Distance Time Solving for Speed Time = Distance Speed Solving for Time Distance = Speed x Time Solving for Distance D Remember them from this triangle: S T

A windsurfer travelled 28 km in 1 hour 45 mins. Calculate his speed. Speed = = Distance Time 28 1. 75 D S T 1 hour 45 mins = 16 km/h Answer: His speed was 16 km / hour

A salesman travelled at an average speed of 50 km/h for 2 hours 30 mins. How far did he travel? Distance = Speed x Time = 50 x 2 • 5 D S T 2 hour 30 mins = 125 km Answer: He travelled 125 km

A train travelled 555 miles at an average speed of 60 mph. How long did the journey take? Distance Time = Speed D S = 555 60 = 9 • 25 hours = 9 hours 15 mins T Answer: It took 9 hours 15 minutes

Try It! 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

You Try 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

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