average speed

noun

the total distance traveled divided by the total time elapsed.

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Word History and Origins

First recorded in 1820–30

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Example Sentences

Noman bowled notably slower than his average speed recording in his previous appearances, and Sajid bowled a little quicker on average than he had in his Test career before this series, and with a significantly higher percentage of quicker balls.

From BBC

The average speed for those caught was just over 28mph.

From BBC

"The drop in the average speed is welcome, but you tend not to see people going 20mph," said Nicholas Lyes IAM RoadSmart.

From BBC

He has average speed and below-average man cover talent.

From Seattle Times

He rode alone into the famous Roubaix velodrome, where the race traditionally finishes, and crossed the finish line in five hours 25 minutes 58 seconds - completing the route at the fastest average speed in the history of the event, which was first held in 1896.

From BBC

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More About Average Speed

What is average speed?

Average speed is calculated by dividing the total distance that something has traveled by the total amount of time it took it to travel that distance.

Speed is how fast something is going at a particular moment. Average speed measures the average rate of speed over the extent of a trip. Average speed is usually applied to vehicles like cars, trains, and airplanes. It is often measured in miles per hour (mph) or kilometers per hour (kph).

Average speed is used in all kinds of fields, including physics, astronomy, and transportation.

How to find average speed

Let’s slow down and start with an example. If you were to drive 200 miles in two hours, you could calculate your average speed by dividing the total distance (200 miles) by the total amount of time it took (two hours), giving an average speed of 100 miles per hour. (Which means the next thing you’re going to have to calculate is how to pay the speeding ticket.)

Average speed might seem like a basic, obvious concept, but for much of history, people didn’t have much of a practical need for such a calculation (plus there were no speedometers on horses). In the 1600s, physicist and astronomer Galileo Galilei tried to calculate the speed of light by measuring how long it would take a person to see a light from across a field. It didn’t work (light is way too fast to be measured this way), but Galileo did come up with the formula distance/time = average speed. (Others probably discussed the concept before that, but Galileo usually gets the credit.)

Average speed should not be confused with instantaneous speed, which measures the speed of an object at a specific instant in time. Instantaneous speed is a physics term. In everyday life, we just call this speed, which is what the speedometer in your car tells you—exactly how fast you’re going at that moment. Speed is sometimes confused with velocity, but they are not the same. In physics, velocity measures something’s speed relative to its direction of motion.

In practical situations, average speed usually comes up in the context of transportation, such as the average speed of a train or airplane during a trip.

Did you know ... ?

Light has an average speed of approximately 186,000 miles (about 300,000 kilometers) per second.

What are real-life examples of average speed?

Average speed is used in physics and other scientific fields, but it’s also used for all kinds of practical applications, especially in transportation. The software that runs your GPS (Global Positioning System) app uses average speed to calculate how long a trip is going to take.

Having just driven 30 miles under 50mph ‘average speed check’ restriction, at night, how does it all work in practice? I’m doubting that the cameras can pick up all number plates at night etc.

Thoughts?

— Steve Litchfield (@stevelitchfield) February 16, 2020

A train covering 900km in 20 hours, an average speed of 45kmph is called Super fast in India.

Just for comparison it takes 5 hrs in Japan for same distance.

— पंक्चर वाला (@pun_cture_wala) February 21, 2020

What are some other words related to average speed?

Quiz yourself!

True or false?

Average speed and average velocity are different measurements.

average revenue averaging light meter

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