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curve of radius 120 m is banked at an angle of 18°. At what speed can it be negotiated under icy conditions where friction is negligible?
Asked by yashifun | 29 Sep, 2019, 09:42: PM
Maximum speed vmax on a banked road is given by

............................(1)
where R is radius of circular path, g is acceleration due to gravity, θ is the angle of banking,
μs is friction coefficient between surface of road and tyre of wheel
when friction force is zero , μs = 0 .  Hence eqn.(1) becomes,   vmax = { R g tanθ }1/2

hence maximu speed, vmax = { 120 × 9.8 × tan18° }1/2 = 19.55 m/s ≈ 70 km/hr
Answered by Thiyagarajan K | 29 Sep, 2019, 10:42: PM

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