Q41 / 46 · NTA Abhyas (JEE Main) 2020 · Physics · Motion In One Dimension

A car moving with a speed of 50 km h-1 can be stopped by brakes in at least 6 m. If the same car is moving at a speed of 100 km h-1, then the minimum stopping distance (in m) is

Correct answer: 24

Solution

The stopping distance of a car is

s=u22a

Therefore, for the two situations given in the question, we can write

s1s2=u1u22=14

6s2=14⇒s2=24 m

Hence, the correct answer is 24.

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