Chapter 05, Problem 15 Multiple-Concept Example 7 and Concept Simulation 5.2 review the concepts that play a role in this problem. Car A use

Question

Chapter 05, Problem 15 Multiple-Concept Example 7 and Concept Simulation 5.2 review the concepts that play a role in this problem. Car A uses tires for which the coefficient of static friction is 0.335 on a particular unbanked curve. The maximum speed at which the car can negotiate this curve is 26.8 m/s. Car B uses tires for which the coefficient of static friction is 0.683 on the same curve. What is the maximum speed at which car B can negotiate the curve?

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Ngọc Khuê 4 years 2021-07-17T11:20:28+00:00 1 Answers 26 views 0

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  1. thanhha
    0
    2021-07-17T11:22:02+00:00
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    Answer:

    Explanation:

    The question relates to motion on a circular path .

    Let the radius of the circular path be R .

    The centripetal force for circular motion is provided by frictional force

    frictional force is equal to μmg , where μ is coefficient of friction and mg is weight

    Equating cenrtipetal force and frictionl force in the case of car A

    mv² / R = μmg

    R = v² /μg

    = 26.8 x 26.8 / .335 x 9.8

    = 218.77 m

    In case of moton of car B

    mv² / R = μmg

    v²  = μRg

    = .683  x 218.77x 9.8

    = 1464.35

    v = 38.26 m /s .

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