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?

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,

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 :

v = 17.37 m/s

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

50 inches should be the resultant vector

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )