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# You are driving a car at a speed of 85 km/h when you notice a barrier across the road 62 m ahead. (a) What is the minimum coefficient of static friction between tires and road that will allow you to stop without striking the barrier? (b) Suppose that you are driving at 85 km/h on a large empty parking lot. What is the minimum coefficient of static friction that would allow you to turn the car in a 62-m radius circle and, in this way, avoid collision with a wall 62 m ahead?

Jitender Pal
6 years ago

Round off to two significant figures,

Therefore, the coefficient of static friction between the tires and the road should be 0.46 .
Therefore, the coefficient of static friction between the tires and the road should be 0.91 .