The passage gives you a value of car's mass, 1000 kg, and coefficient of static friction, 0.6 & also that of kinetic friction, 0.2.

Q: The car is traveling at a velocity of 24 m/s along a level road. What is the shortest time it will take for the car to come to rest? (Assume that the car does not skid, and neglect air resistance.)

Explanation:

What's the reasoning behind this?

Thus the acceleration is found from F= ma= u

Q: The car is traveling at a velocity of 24 m/s along a level road. What is the shortest time it will take for the car to come to rest? (Assume that the car does not skid, and neglect air resistance.)

Explanation:

The question asks for the least time, which means that the static force of friction is at its maximum value

What's the reasoning behind this?

Thus the acceleration is found from F= ma= u

**static*** N & then one uses v = vo + at
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