Kinematics

JEE Main level, single correct, medium

75 of 308

Question 75 of 308

An automobile travelling with speed of 60 km/h60 \mathrm{~km} / \mathrm{h}, can brake to stop within a distance of 20 cm20 \mathrm{~cm}. If the car is going twice as fast, i.e 120 km/h120 \mathrm{~km} / \mathrm{h}, the stopping distance will be

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Answer: (D) 80 m80 \mathrm{~m}

If the initial speed is doubled, the stopping distance becomes four times, i.e. 80 m80 \mathrm{~m}.

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