Facts about Speed
Some facts about speed are listed as follows:
- Speed can never be negative.
- Speed is a scalar quantity which means it has only magnitude but not direction.
- Speed of light in vacuum is 299,792,458 m/s.
- Speed of sound in dry air is 343.2 m/s.
- Escape velocity of earth, i.e. speed required to escape an object from the gravitational pull is 11.2 km/s.
Unit of Speed
Unit of Speed is meters per second or m/s. Speed is a physical quantity that measures the distance travelled by an entity per unit of time. The most commonly used units for speed are meters per second (m/s), kilometres per hour (km/h) and miles per hour (mph). Speed and Velocity are the same physical quantity except for the difference that velocity is a vector quantity and speed is a scalar quantity, so speed and velocity units are the same.
In this article, we will learn the definition of speed, the unit of speed, conversion between units in various systems, sample problems, and frequently asked questions related to the unit of speed.
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