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Physics / University Physics 13 / Chapter 5 / Problem 20DQ

University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman

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A curve in a road has a bank angle calculated and posted

Chapter 8, Problem 20DQ

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QUESTION:

A curve in a road has a bank angle calculated and posted for 80 km/h. However, the road is covered with ice, so you cautiously plan to drive slower than this limit. What might happen to your car? Why?

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QUESTION:

A curve in a road has a bank angle calculated and posted for 80 km/h. However, the road is covered with ice, so you cautiously plan to drive slower than this limit. What might happen to your car? Why?

ANSWER:

Solution 20DQ Step 1: When the road is icy, the friction between the road and the tyre will get decreased. Actually while turning the steering, the direction of motion of the wheel changes due to the change in direction of frictional force acting on the tyres. So, the car will cover the turn easily. If the magnitude of the speed of the car is small, then, frictional force magnitude will be more and the car will easily turn at lower speeds. If the speed is more, taking a turn will be more difficult.

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