Friction provides the force needed for a car to travel around a flat, circular race track. What is the maximum speed at which a car can safely travel if the radius of the track is 79.0 m and the coefficient of friction is 0.39?

Respuesta :

Answer:

Maximum speed of the car is 17.37 m/s.

Explanation:

Given that,

Radius of the circular track, r = 79 m

The coefficient of friction, [tex]\mu=0.39[/tex]

To find,

The maximum speed of car.

Solution,

Let v is the maximum speed of the car at which it can safely travel. It can be calculated by balancing the centripetal force and the gravitational force acting on it as :

[tex]v=\sqrt{\mu rg}[/tex]

[tex]v=\sqrt{0.39\times 79\times 9.8}[/tex]

v = 17.37 m/s

So, the maximum speed of the car is 17.37 m/s.