What is Unit of Speed?
Unit of Speed is the measurement of magnitude of speed according to defined standard or convention. As the formula of speed is distance travelled per unit time, unit of speed would be the unit of distance per unit of time taken. For convenience, various systems of units have been adopted and units can be converted from one system to another by multiplication with some factor. The S.I. unit of speed is meters per second. The unit of speed depends upon the chosen units of distance and time.
Dimensional Formula for Speed
The dimensional formula for speed is [M0 L1 T-1]. It can be derived using the formula for speed, i.e. Speed = Distance/Time
Substituting the dimensions for distance and time, we get,
Dimension of Speed = [M0L1T0]/[M0L0T]
Dimension of Speed = [M0 L1 T-1]
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.