Physics-
General
Easy

Question

Two identical masses A and B are hanging stationary by a light pulley (shown in the figure). A shell C moving upwards with velocity v collides with the block B and gets stick to it. Then

  1. First string becomes slack and after some time becomes taut    
  2. The momentum conservation principle is applicable to B and C    
  3. The string becomes taut only when down displacement of combined mass B and C is occurred    
  4. Both (a) and (b) are correct    

The correct answer is: Both (a) and (b) are correct


    When C collides with B then due to impulsive force, combined mass (B plus C) starts to move upward. Consequently the string becomes slack

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