An automobile in travelling at $50\ {kmh}^{- 1},$ can be stopped at a distance of 40 m by applying brakes. If the same automobile is travelling at $90\ {kmh}^{- 1},\ $ all other conditions remaining same and assuming no skidding, the minimum stopping distance in metre is

Question

Dr. Abubacker · Accepted Answer

(d) Stopping distance $s \propto u^{2}$
$\Rightarrow \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \frac{s_{2}}{40} = \left( \frac{90 	imes \frac{5}{18}}{50 	imes \frac{5}{18}} ight)^{2}$
$\Rightarrow \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ s_{2} = 129.6\ m$

Q. An automobile in travelling at $50\ {kmh}^{- 1},$ can be stopped at a distance of 40 m by applying brakes. If the same automobile is travelling at $90\ {kmh}^{- 1},\ $ all other conditions remaining same and assuming no skidding, the minimum stopping distance in metre is

Explanation

Reviewed by Dr. Abubacker

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