Question

Who discovered Speed ?

Answer 1

Hint: To know about the speed and the discoverer of speed, we should go through the whole concept of speed and we will relate distance and time with the speed to know the presence of speed in the surroundings.

Complete answer:
The Italian physicist Galileo Galilei is credited with being the first to measure speed by considering the distance covered and the time it takes. Galileo defined speed as the distance covered per unit of time.Speed is measured as the ratio of distance to the time in which the distance was covered. Speed is a scalar quantity as it has only direction and no magnitude.
The formula of speed is given in the table below:
$s = \dfrac{d}{t}$
Here, $s$ is the speed in $m.{s^{ - 1}}$, $d$ is the distance travelled in metre, $t$ is the time taken in second and the mathematical representation of speed is:
$Speed = \dfrac{{Dis\tan ce}}{{Time}}$
The dimensional formula of speed is: ${M^0}{L^1}{T^{ - 1}}$ .
There are four types of speed and they are:
1. Uniform Speed
2. Variable Speed
3. Average Speed
4. Instantaneous Speed

Note:For the measurement of speed in vehicles, speedometers are used. To measure the distance covered odometers are used. Speed can also be calculated with the help of a graph. The Distance-time graph helps in understanding the speed of an object.