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Static and Kinectic Problem Help

  1. Oct 11, 2006 #1
    Homework Problem

    A Worker is pulling a box and applies a force at an angle of 45 degress to the horizontal, how large must the force be to move the box

    FBD:

    n
    | /
    | / <----Angle in between is 45 degrees
    O ------F cos 45
    |
    |
    mg

    :confused: Please help, confused about how to solve this problem
    Thanx in advance
     
  2. jcsd
  3. Oct 11, 2006 #2
    Well since they didn't give you any values (I assume), you are going to leave everything as variables. Break the force down into components first, find the component in the x-direction necessary to be greater than the force of static friction, then rebuild your original force knowing that value.

    Try it and post when you get stuck.
     
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