A car round on unbanked curve of radius 92 m without skidding at a speed of 26 m s - 1 . The smallest possible coefficient of static friction between the tyres and the road is

Question

A car round on unbanked curve of radius 92 m without skidding at a speed of 26 m s - 1 . The smallest possible coefficient of static friction between the tyres and the road is, 0 . 75, 0 . 60, 0 . 45, 0 . 30

MARKS App · Accepted Answer

f s ≤ f s max Centripetal force is equal to maximum static friction m v 2 r ≤ μ m g μ ≥ v 2 r g μ min = v 2 r g μ min = 26 2 92 × 9 . 8 μ min = 0 . 75

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