Question

A car moved horizontally on a road at a constant velocity. If the mass of the car is 1,000 kg and the friction between the tires and the road was 1,500 N, what was the coefficient of friction?

Answer 1

$F-F_{fr}=0\to F=F_{fr}$

$F_{fr}=\mu N=\mu mg\to \mu=F_{fr}/(mg)=1500/(1000\cdot9.8)=$

$=0.153$ . Answer