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NEET Physics · Medium

Laws of Motion: Mixed Laws of Motion MCQ

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Mixed Laws of MotionMediumQuestion 5447

Question

A bullet (10 g) moving at 400 m/s is stopped in 0.01 s. The retarding force is:
  1. A
    400 N
    Correct
  2. B
    4000 N
  3. C
    40 N
  4. D
    4 N

Correct answer

400 N

Explanation

F = m(Δv/Δt) = 0.01 × (400/0.01) = 0.01 × 40000 = 400 N.

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