Speed, Distance, Time Calculations. You Need: Colored PencilsScience Notebook Science Folder...
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Transcript of Speed, Distance, Time Calculations. You Need: Colored PencilsScience Notebook Science Folder...
Speed, Distance, Time Calculations
You Need:Colored Pencils Science NotebookScience 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 = ____________
Speed is how fast something is going or the distance something moves in a given amount of time.
Speed = distance----------time
Speed is measured in miles per hourSpeed is also measured in kilometers per
hour
Measurement Unit
Speed Miles/Hour or Km/Hour
Distance Miles/Kilometers
Time 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 1 hour60 minutes
7/60 = .12 hours
15 mins = _____ Hours
.25 Hours
30 minutes = _____ hours
.5 hours
3 hours 45 minutes = _____ hours
3.75 Hours
D
S T
The 3 formulas for Speed, Time & Distance:
Speed = Distance
TimeTime =
Distance
SpeedDistance =Speed x Time
Remember them from
this triangle:
D
S T
Solving for Speed Solving for Time Solving for Distance
D
S T
A windsurfer travelled 28 km in 1 hour 45 mins.
Calculate his speed.
Speed =
DistanceTime
28
1.75=
= 16 km/h
1 hour 45 mins
Answer: His speed was 16 km / Answer: His speed was 16 km / hourhour
2 hour 30 mins
Answer: He travelled 125 kmAnswer: 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
S TDistance = Speed x Time
= 50 x 2•5
= 125 km
Answer: It took 9 hours 15 minutesAnswer: 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
S TTime =
DistanceSpeed
55560=
= 9•25 hours
= 9 hours 15 mins
Your dad traveled 75 miles in 2.5 hours. What was his speed?
30 miles/hour
Write your equationChange your unitsFill in the info you
knowSolveWrite proper units,
circle your answer
Yolanda travels 240 kilometers in 4 hours. What was her average speed?
60 miles/hour
Write your equationChange your unitsFill in the info you
knowSolveWrite proper units,
circle your answer
Mikes speed was 20 km/hour. He traveled for 10 hours. How many kilometers did he drive?
200 kilometers
Write your equationChange your unitsFill in the info you
knowSolveWrite proper units,
circle your answer