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Homework Help: Static friction problem

  1. Mar 7, 2014 #1
    1. The problem statement, all variables and given/known data
    4.00-kg block rests on a 30.0° incline as shown in the figure. If the coefficient of static friction between the block and the incline is 0.700, what magnitude horizontal force F must act on the block to start it moving up the incline?

    2. Relevant equations
    F=ma FfrictionsFnormal

    3. The attempt at a solution
    Numerous attempts to long to type out.
  2. jcsd
  3. Mar 7, 2014 #2
    The forces acting on it are its weight and the friction force. A body will not move until the maximum static force is applied on it. Now think what should be the ''minimum'' F to move up the incline so that it overcomes the weight and static friction.
  4. Mar 7, 2014 #3


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    2017 Award

    Need more relevant equations (Fn ?)
    And at least one attempt. Take what you think is the best and show where it gets stuck.
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