Wheel

How many times turns the wheel of a passenger car in one second if car run at speed 100 km/h. Wheel diameter is d = 62 cm.

Correct answer:

n =  14.2612

Step-by-step explanation:

$$\begin{gathered} v=100km\mathrm{/}h=27.78m\mathrm{/}s \\ o=2\pi r=\pi D=\pi \cdot 62cm=1.95m \\ n={\displaystyle \frac{v}{o}}={\displaystyle \frac{27.78}{1.95}}=14.2612 \end{gathered}$$

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