What is the maximum speed with which a 1200-kg car can round a turn of radius 90.0 m on a flat road if the coefficient of friction between t

Question

What is the maximum speed with which a 1200-kg car can round a turn of radius 90.0 m on a flat road if the coefficient of friction between tires and road is 0.80?

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Lệ Thu 3 years 2021-08-17T07:12:08+00:00 1 Answers 79 views 0

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  1. nguyetanh
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    2021-08-17T07:13:33+00:00
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    Answer:

    Maximum speed of the car is 26.56 m/s.

    Explanation:

    Given that,

    Mass of the car, m = 1200 kg

    Radius of the curve, r = 90 m

    The coefficient of friction between tires and the road is 0.8.

    We need to find the maximum speed of the car. On the circular curve, the centripetal force is balanced by the force of friction. So,

    \dfrac{v^2}{r}=\mu g\\\\v=\sqrt{\mu gr} \\\\v=\sqrt{0.8\times 9.8\times 90} \\\\v=26.56\ m/s

    So, the maximum speed of the car is 26.56 m/s.

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