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Please Help me with this force problem, Thank you

  1. Sep 27, 2009 #1
    1. The problem statement, all variables and given/known data

    A 70 kg crate is pushed at constant speed up the frictionless 23°

    What horizontal force F is required? ( x Component Force)?

    What force is exerted by the ramp on the crate?




    2. Relevant equations

    I used wsin(23) then i did (wsin(23))cos(23) which i found 246.73 N

    and I used Wcos(23)= 631 N

    I know that Fnet= 0 since the Velocity is constant acceleration is zero

    I did a freebody Diagram



    3. The attempt at a solution

    I got 246.7 N for force in the Horizontal direction

    and I got 631 N for what the second question is asking for.

    I did that by calculating the Normal force.

    Please Help
     
  2. jcsd
  3. Sep 27, 2009 #2

    Doc Al

    User Avatar

    Staff: Mentor

    It's a bit hard to tell what you did. Start by identifying all the forces acting on the crate. Then write two equations: One for force components parallel to the incline; the other for components perpendicular.
     
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