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Two cars of unequal masses use similar tyres. If they are moving with same initial speed, the minimum stopping distance is?

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Smaller for the heavier car

Same for both the cars

Smaller for the lighter car

Depends on the volume of the car

answer is B.

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Detailed Solution

The minimum stopping distance is the same for both cars.
From the third equation of motion,

v^{2} = u^{2} - 2 as

(Negative sign indicates there is retardation)
Initial velocity is the same both cars
Final velocity, v = 0 for both the cars.

0 = u^{2} - 2 as

s = \frac{u^{2}}{2 a}

Since, initial velocity and the retardation is the same for both cars, the minimum stopping distance will be same for both the cars.

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