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Homework Help: Newtons laws

  1. Feb 18, 2008 #1
    1. A sphere of mass 3.3*10-4 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes a constant angle of 35° with the vertical.
    (a) Find the magnitude of that push.

    (b) Find the tension in the cord.

    2. Relevant equations


    3. The attempt at a solution

    I divided it into horizontal and vertical components, but was unable to really succeed from there.
  2. jcsd
  3. Feb 18, 2008 #2


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    If the constant horizontal breeze is holding the ball steady at a certain angle, then what can you say about the net horizontal force acting on the ball? Can you then use components to find out the magnitude of the force of the wind?
  4. Feb 18, 2008 #3
    I would recommend setting up a free body diagram for the sphere, representing all the forces in play.
    The cord makes constant angle, constant being the key word for what's going on.
    With this you should be able to solve for both [tex]F_p[/tex] and [tex]F_T[/tex]
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