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Laws of Motion: Mixed Laws of Motion MCQ

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Mixed Laws of MotionMediumQuestion 5449

Question

A car (1000 kg) moving at 20 m/s is brought to rest in 4 s. The braking force is:
  1. A
    5000 N
    Correct
  2. B
    80000 N
  3. C
    200 N
  4. D
    50 N

Correct answer

5000 N

Explanation

a = 20/4 = 5 m/s². F = ma = 1000×5 = 5000 N.

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