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6 April, 00:32

A car moves along a curved road of diameter 2 km. If the maximum velocity for safe driving on this path is 30 m/s, at what angle has the road been banked? (Ignore friction.)

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  1. 6 April, 00:53
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    The maximum velocity in a banked road, ignoring friction, is given by;

    v = Sqrt (Rg tan ∅), where R = Radius of the curved road = 2*1000/2 = 1000 m, g = gravitational acceleration = 9.81 m/s^2, ∅ = Angle of bank.

    Substituting;

    30 m/s = Sqrt (1000*9.81*tan∅)

    30^2 = 1000*9.81*tan∅

    tan ∅ = (30^2) / (1000*9.81) = 0.0917

    ∅ = tan^-1 (0.0917) = 5.24°

    Therefore, the road has been banked at 5.24°.
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