As a car skids with its wheels locked trying to stop on a road covered with ice and snow,the force of friction between the icy road and the tires will usually be:
A) greater than the normal force of the road times the coefficient of static friction.
B) equal to the normal force of the road times the coefficient of static friction.
C) less than the normal force of the road times the coefficient of static friction.
D) greater than the normal force of the road times the coefficient of kinetic friction.

Question

Quizplus · Accepted Answer

When the wheels are locked, the skid results in kinetic friction, which is less than the static friction. Therefore, the force of friction between the icy road and the tires will be less than the normal force of the road times the coefficient of static friction (μs).

As a Car Skids with Its Wheels Locked Trying to Stop