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Homework Help: Find the acceleration of the blocks

  1. Jul 10, 2011 #1
    1. The problem statement, all variables and given/known data

    Find the acceleration of the blocks if a horizontal force of 10 N is applied on the 7 kg block.
    u1, u2 and u3 are the coefficients of friction. refer diagram. thanx in advance

    2. Relevant equations

    3. The attempt at a solution

    the force of friction between 7 kg and 3 kg is 15 N which is more than the applied force so they will move together like a single block. im confused abt the motion of the 4 kg block will it move with a different acceleration or same?

    Attached Files:

  2. jcsd
  3. Jul 10, 2011 #2


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    Science Advisor
    Homework Helper

    hi jyothsnapb! :wink:

    do questions like this systematically …

    call the accelerations of the three blocks a1 a2 and a3,

    then write out F = ma equations for each block …

    what do you get? :smile:
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