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The basic unit of speed is:
$(i).\ km/min$
$(ii).\ m/min$
$(iii).\ km/h$
$(iv).\ m/s$
The correct answer is: $(iv).\ m/s$
Explanation:
Distance traveled per unit of time by a moving object is called its speed.
So, $\boxed{Speed=\frac{Distance}{Time}}$
Derivation of the basic unit of speed:
Distance is the length of the path traveled by a moving object. The SI unit of distance is $meter$ which is abbreviated as $m$.
The SI unit of time is $second$ which is abbreviated as $s$.
The SI unit of speed $=\frac{unit\ of\ distance}{unit\ of\ time}$
$=\frac{meter(m)}{second(s)}$
Therefore, the SI unit or basic unit of speed is meter per second$(m/s)$.
Note:
$km/min$, $m/min$, and $km/h$ are also units of speed but only $m/s$ is the basic unit or SI unit of the speed.
So, option $(iv)$ is correct.
Updated on: 10-Oct-2022
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