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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?

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?
 

Grade:10

1 Answers

Jitender Pal
askIITians Faculty 365 Points
8 years ago
235-492_1.PNG
Round off to two significant figures,
235-1379_1.PNG
Therefore, the coefficient of static friction between the tires and the road should be 0.46 .235-9_1.PNG
Therefore, the coefficient of static friction between the tires and the road should be 0.91 .

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