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