slide1 l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Time Distance Speed Calculations PowerPoint Presentation
Download Presentation
Time Distance Speed Calculations

Loading in 2 Seconds...

play fullscreen
1 / 7

Time Distance Speed Calculations - PowerPoint PPT Presentation


  • 107 Views
  • Uploaded on

Time Distance Speed Calculations. Distance = Speed × Time. Units of Measure:. Time:. Hours. Minutes. There are 60 minutes in an hour so convert these times in minutes to hours (in decimal notation). Minutes to hours. Hours to minutes. Write as a fraction compared

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Time Distance Speed Calculations' - percy


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Time Distance Speed Calculations

Distance = Speed × Time

Units of Measure:

Time:

Hours

Minutes

There are 60 minutes in an hour so convert these times in

minutes to hours (in decimal notation).

Minutes to hours

Hours to minutes

Write as a fraction compared

with 60 minutes (in an hour)

Multiply by 60

30

60

30 minutes

= 0.5 hrs

2 hours

2× 60

= 120 mins

15

60

15 minutes

= 0.25 hrs

0.75 hours

0.75× 60

= 45 mins

slide2

Time Distance Speed Calculations

Distance = Speed × Time

Units of Measure:

Distance:

Kilometres

Miles

Metres

Means ÷

Speed:

Kilometres per hour

km/hr

km/hr

Miles per hour

miles/hr

Metres per second

m/s

The calculation is given by the units of measure

Distance

Time

Speed =

slide3

Time Distance Speed Calculations

Distance = Speed × Time

D = S × T

  • Use this formula to find the distances for:
  • 20 miles per hour for 2 hours
  • 60 miles per hour for 4 hours
  • 40 kmph for 30 minutes
  • 80 miles per hour for 15 minutes
  • 42 km per hour for 10 minutes

20 × 2

40 miles

60 × 4

240 miles

40 × 30

60

20 km

80 × 15

60

20 miles

42 × 10

60

7 km

slide4

Time Distance Speed Calculations

Distance = Speed × Time

Using what we have learnt from rearranging equations

If

D

=

S

×

T

then

D

=

S

×

T

and

D

=

S

×

T

slide5

Time Distance Speed Calculations

Speed = Distance

Time

  • Use this formula to find :
  • A train travels 240 km in 4 hours
    • What is its average speed?
  • A plane flies over two cities that are 63 miles apart.
  • The journey takes 7 minutes. What is its average speed?
  • Answer in miles per minute
  • 3. An athlete can run 100 metres in 12 seconds. Calculate the
  • athlete’s speed.
  • Answer in metres per second and 1 d.p.
  • A cheetah took 6 seconds to run 150m. How fast did it run?
  • Answer in metres per second

240

4

= 60 km per hour

63

7

= 9 miles per minute

100

12

= 8.3 m per second

150

6

= 25 m per second

slide6

Time Distance Speed Calculations

Time = Distance

Speed

  • Use this formula to find :
  • A man ran 400 m at an average speed of 8 m/s
    • How long did he take?
  • A coach travels 120 miles at an average speed of 40 mph.
    • How long did it take?
  • A walker travels a distance of 3 km at a steady speed of 4km.
  • Find how long he takes in minutes.
  • A cyclist travelled 6 km at 18 kmph.
  • Find how long he takes in minutes.

400

8

= 50 seconds

120

40

= 3 hours

3

4

= 0.75 hrs

0.75× 60

= 45 mins

.

.

6

18

= 0.3 hrs

= 20 mins

0.3× 60

slide7

Time Distance Speed Calculations

  • A delivery van sets off at 07:45 to deliver a package 20 miles
  • from the store. It arrives at the customer at 08:10
  • Calculate the van’s average speed in miles per hour
  • The van’s average speed on the return journey is 25 mph.
  • b) How long does the return journey take?
  • Give your answer in minutes.
  • c) Calculate the van’s average speed for the whole journey.

25

60

20

0.4167

= 0.4167 hrs

= 48 miles per hour

20

25

= 0.8 hrs

0.8× 60

= 48 mins

40 miles for (25 + 48) = 73 minutes

73

60

40

1.2167

= 1.2167 hrs

= 32.9 miles per hour