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Paragraph: Figure shows block A of mass 0.2 kg sliding to the right over a frictionless elevated surface at a speed of 10 ~m / s . The block undergoes a collision with stationary block B , which is connected to a non-deformed spring of spring constant 1000 Nm ⁻¹ . The coefficient of restitution between the blocks is 0.5. After the collision, block B oscillates in SHM with a period of 0.2 s, and block A slides off the

Options

  1. A0.4 kg
  2. B0.8 kg
  3. C1 kg
  4. D1.2 kg

Correct answer

C. 1 kg

Step-by-step solution

T =2 ~m ~K ~m = T ^2 ~K 4 ^2 = 0.2 0.2 1000 4 10 =1 ~kg

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