A car, moving with a speed of 50 ,km/hr , can be stopped by brakes after at least 6,m . If same car

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2.Motion in Straight Line

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A car, moving with a speed of $50 \,km/hr$, can be stopped by brakes after at least $6\,m$. If the same car is moving at a speed of $100 \,km/hr$, the minimum stopping distance is..........$m$

A$6$

B$12$

C$18$

D$24$

(AIEEE-2003)

Solution

(d)$S \propto {u^2}$. Now speed is two times so distance will be four times $S = 4 \times 6 = 24\,m$

Standard 11

Physics

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