Question

38) The tires on a car have a radius of 31 cm. What is the angular speed of these tires when the car is driven at 15 m/s?

Answer 1

Given that radius of tyre is, r= 31 cm = 0.31 m and linear speed of car is, v = 15 m/s

To find the angular speed.

Formula to find angular speed,

$\omega=\frac{v}{r}$

Substituting the values, we get angular speed,

$\begin{gathered} \omega=\frac{15}{0.31} \\ =48.38s^{-1} \end{gathered}$

Thus, angular speed is 48.38 per second.