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Concepts Of Physics MCQ Edition [Volume 1]PhysicsRest and Motion Kinematics

A bullet travelling with a velocity of 16 m/s penetrates a tree trunk and comes to rest in 0.4 m . Determine the time taken during the retardation in seconds.

Options

  1. A0.10
  2. B0.05
  3. C0.025
  4. D0.40

Correct answer

B. 0.05

Step-by-step solution

Initial velocity, u = 16 m/s Final velocity, v = 0 m/s Distance covered, s = 0.4 m Using the equation of motion s = ( u + v 2 )t : 0.4 = ( 16 + 0 2 )t 0.4 = 8t t = 0.4 8 = 0.05 s

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