STANDARD Physics Uniform Acceleration MCQ Question
A car moving along a straight road with speed of 144 km h⁻¹ is brought to a stop within a distance of 200 m. How long does it take for the car to stop?
5s
10s
15s
20s
Correct Answer
Detailed Explanation
The initial speed is converted to m/s: 144 km/h = 40 m/s. Using the equation v² = u² + 2as, we find the acceleration a = -4 m/s². Using v = u + at, we solve for t: 0 = 40 + (-4)t, giving t = 10s.
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