A car travels forward along a level road at constant velocity through the air wi

Question

A car travels forward along a level road at constant velocity through the air with measurable air resistance. When a tire rolls the force the ground exerts on it is due to static friction, because the surface of the tire is not moving relative to the ground. Under these conditions, the force of friction between the road and the tires rolling on the road is

a. greater than the normal force multiplied by the coefficient of static friction.

b. equal to the normal force multiplied by the coefficient of static friction.

c. equal to the normal force multiplied by the coefficient of kinetic friction.

d. less than the normal force multiplied by the coefficient of static friction but

greater than zero.

e. zero.

Explanation / Answer

Answer

b)equal to normal force multiplied by the coefficient of kinetic friction.

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