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Homework Help: Centre of mass, collision, momentum

  1. Apr 16, 2013 #1
    Two blocks m1 and m2 are connected by an ideal spring of force constant k. The blocks are placed on smooth horizontal surface. A horizontal force F acts on the block m1. Initially spring is relaxed, both the blocks are at rest.
    What is maximum elongation of spring?

    i think it would be when both the objects are moving with same velocity, so i applied law of conservation of energy but the equation has too many variables.
  2. jcsd
  3. Apr 16, 2013 #2


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    Please honour us with your working so far.
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