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MHT CET2012PhysicsLaws of Motion

A body of mass 2 ~kg collides with a wall with a speed of 100 ~ms ⁻¹ and rebounds with the same speed. If the time of contact is 1 / 50 ~s , the force exerted on the wall is

Options

  1. A8 ~N
  2. B2 10⁴ ~N
  3. C4 ~N
  4. D10⁴ ~N

Correct answer

B. 2 10⁴ ~N

Step-by-step solution

We know that, F= d p d t = m d v d t = m 2 v 1 / 50 = 2 2 100 1 / 50 =2 10⁴ ~N

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