Question

If the road of the previous problem is horizontal (no banking), what should be the minimum friction coefficient so that a scooter going at 18 km/hr does not skid ?

Answer 1

The road is horizontal (no banking)

$\frac{m{v}^2}{R}=\mu N\text{and}N=mg\text{So}\frac{m{v}^2}{R}=\mu mg$

Here, v = 5 m/sec, R = 10 m

$\therefore \frac{25}{10}=\mu g$

$\Rightarrow \mu =\left(\frac{25}{100}\right)=0.20$