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Homework Help: Object raised up the plank

  1. Jun 28, 2017 #1
    1. The problem statement, all variables and given/known data

    A frictionless sloping plank is 6m long .An oil
    drum of 300N is raised up the sloping plank by an effort of 15N.Calculate the height to which the oil drum rises .
    1) 2m
    2) 7m
    3) 3m
    4) 0.3m

    2. Relevant equations

    3. The attempt at a solution

    I am not able to interpret the problem correctly.I can do the problem if only I understand the statement given .

    Is the sloping plank a fixed inclined plane on which we have to push an object upwards along the slope ?

    What is an effort ? Is it a constant applied force?

    Why should the height to which object rises be limited ?

    Please help me understand the problem statement .
  2. jcsd
  3. Jun 28, 2017 #2


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    Yes the units are given as Newton's.

    It's limited by the length of the plank, the angle and available force.
  4. Jun 28, 2017 #3
    That means angle of plank θ = sin-1(1/20) and option 4) is correct ?
  5. Jun 28, 2017 #4


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