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Question 30433
JEE Physics · Hard

Work, Power and Energy: Stopping Distance MCQ

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Stopping DistanceHardQuestion 30433

Question

A car (m = 1000 kg) moving at 30 m/s is braked to rest. Braking force = 15000 N. Stopping distance is:
  1. A
    30 m
    Correct
  2. B
    15 m
  3. C
    45 m
  4. D
    60 m

Correct answer

30 m

Explanation

W = ΔKE: −15000×d = 0 − ½×1000×900 = −450000. d = 450000/15000 = 30 m.

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