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Concrete Block Incline acceleration question

  1. Feb 19, 2016 #1
    1. The problem statement, all variables and given/known data
    A concrete block of mass 25kg is placed on a smooth slope that makes an angle of 30 degrees with the horizontal. Ignoring the effects of air resistance, calculate
    a) the acceleration of the block as it slides down (g = 9.81 ms-2)
    b) the distance the block moves in 3 seconds

    2. Relevant equations


    3. The attempt at a solution
    w = mg
    w = 25 * 9.81 = 245.25N
    Wsin(theta) = 245.25 * sin(30) = 122.625N
    122.625N / 25kg = 4.905ms-2?
     
  2. jcsd
  3. Feb 19, 2016 #2
    so, what is the problem you are facing?
     
  4. Feb 19, 2016 #3
    Is it correct? @Verma S.P.
     
  5. Feb 19, 2016 #4

    cnh1995

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    Homework Helper

    Looks correct to me.
     
  6. Feb 19, 2016 #5
    whether it is correct or not will decide your 'free body diagram! pl. draw a free body diagram for the forces operating/acting on the block !
     
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