STANDARD Physics Stopping Distance MCQ Question
A car moving with a speed of 50 km h⁻¹ can be stopped by applying brakes after moving at least 6 m. If the same car is moving at a speed of 100 km h⁻¹ the minimum stopping distance is
6 m
12 m
18 m
24 m
Correct Answer
Detailed Explanation
Stopping distance, d = u²/2a where u is the initial speed of the car. As the stopping distance is proportional to the square of the initial velocity, doubling the initial velocity increases the stopping distance by a factor of 4.
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