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General
Easy

Question

Two blocks of masses 3 kg and 6 kg rest on a horizontal smooth surface. The 3 kg block is attached to a spring with a force constant k = 900 Nm-1 which is compressed 2 m from beyond the equilibrium position. The 6 kg mass is at rest at 1m from mean position.3kg mass strikes the 6 kg mass and the two stick together

  1. velocity of the combined masses immediately after the collision is 10 ms-1    
  2. velocity of the combined masses immediately after the collision is 5 ms-1    
  3. Amplitude of the resulting oscillation is square root of 2 m    
  4. Amplitude of the resulting oscillation is square root of 5/2 m    

The correct answer is: velocity of the combined masses immediately after the collision is 10 ms-1

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