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Miles per hour

physical science Maturity 11-13 Next article →

Miles per hour tells us how fast something moves.

UK 50 mph speed limit sign
UK 50 mph speed limit sign

It counts how many miles are traveled in one hour. We call this unit mph. Many people use it in the United States. It is also used in the United Kingdom. You can see it on road signs.

2014-08-19 11 59 11 Speed limit 65 miles per hour sign along northbound Nevada State Route 225 (Mountain City Highway) about 10.9 miles north of Nevada State Route 535 (Idaho Street) in Elko County, Nevada
2014-08-19 11 59 11 Speed limit 65 miles per hour sign along northbound Nevada State Route 225 (Mountain City Highway) about 10.9 miles north of Nevada State Route 535 (Idaho Street) in Elko County, Nevada

Many places use it for speed limits. These places include Belize and the Bahamas. It is used in many British territories too.

Trains use this unit as well. Rail systems in Canada and Ireland use it. Some British rail systems use it too. Not all do. For example, the Channel Tunnel does not use it. Some sports use mph to measure speed. It can show how fast a ball moves in cricket. It is used in tennis and baseball. Ships and planes usually use a different unit. They often use the knot. One knot is one nautical mile per hour.

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🖼️ Images & Media (3)
File:World Map of Speed Limit Units on Traffic Signs.svg
World Map of Speed Limit Units on Traffic...
File:UK 50 mph speed limit sign.jpg
UK 50 mph speed limit sign.jpg
File:2014-08-19 11 59 11 Speed limit 65 miles per hour sign along northbound Nevada State Route 225 (Mountain City Highway) about 10.9 miles north of Nevada State Route 535 (Idaho Street) in Elko County, Nevada.JPG
2014-08-19 11 59 11 Speed limit 65 miles...
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