Question

Convert 6 m/s to km/hr and put a formula of speed?

Answer 1

This could be simply solved by converting meter to kilometre and second to hour. The average speed is the distance per time ratio. Here, we will use the basic formula of speed, distance and time:
${{\text{V}}_{{\text{avg}}}}{\text{ = }}\dfrac{{\text{D}}}{{\text{T}}}$
Here, ${{\text{V}}_{{\text{avg}}}}$ is the mean speed
${\text{D}}$ is the total distance travel
$T$ is the travel time.

Complete step by step answer:
We will start by converting meter to kilometre and second to hour.
We know that, 1 Km = 1000 m
And, 1 hour = 60 min = 3600 sec
$\Rightarrow \dfrac{{6 \times 60 \times 60}}{{1000}}$
$\Rightarrow 21.6{\text{km/hr}}$
And also, the formula of speed is stated above.
And it should be noted that the mean speed over distance:
${{\text{v}}_{{\text{avg}}}}{\text{ = }}\dfrac{{{{\text{d}}_{\text{1}}}{\text{ + }}{{\text{d}}_{\text{2}}}{\text{ + }}{{\text{d}}_{\text{3}}}}}{{{{\text{t}}_{\text{1}}}{\text{ + }}{{\text{t}}_{\text{2}}}{\text{ + }}{{\text{t}}_{\text{3}}}}}$
Thus, the speed is 21.6 kmph.

Additional Information
Speed is a scalar quantity that refers to "how fast an object is moving." Speed can be thought of as the rate at which an object covers distance. We can understand speed with the following example: if you drive to a store and return home in half an hour, and your car's odometer shows the total distance travelled was 6 km, then your average speed was 12 km/h. The first scientist to measure speed as distance over time was Galileo.

Note:
It should always be kept in mind that there is a difference between speed and velocity. Just as distance and displacement have distinctly different meanings, same is the situation between speed and velocity. Velocity is a vector quantity that refers to the rate at which an object changes its position whereas speed is a scalar quantity that refers to how fast an object is moving. Velocity gives us a sense of direction whereas speed does not give any sense of direction.