Change the speed of $6{\mathrm{ms}}^{-1}$ into km/h.

Meter per second:

1. The SI unit of speed and velocity is a meter per second.
2. This is the distance traveled in one second of time.
3. The unit of acceleration is given by meters per second per second ($\mathrm{m}/{\mathrm{s}}^2$).

Kilometer per hour conversion:

1. This is a measurement of speed typically used in countries using the metric system.
2. $\mathrm{km}/\mathrm{h}$ is the most commonly used unit of speed in the world, and it is commonly used for car speeds and road signs.
3. On automotive speedometers, both miles per hour and kilometers per hour are commonly displayed.

Changing the speed of 6 ms into kmh:

Given that,

Speed $\mathrm{v}=6\mathrm{m}/\mathrm{s}$

Speed in $\mathrm{km}/\mathrm{h}$

$\mathrm{v}=6\times \frac{18}{5}$

$\mathrm{v}=21.6\mathrm{km}/\mathrm{h}$

Hence the speed is $21.6\mathrm{km}/\mathrm{h}$.