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Math Help - Force on cart

  1. #1
    Senior Member Twig's Avatar
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    Force on cart

    Hi

    Description in the attached picture.

    How can the ramp exert a force larger than the weight of the person !! (?)

    Also, I am not sure how to interpret the  \beta angle.
    Attached Thumbnails Attached Thumbnails Force on cart-pic_06.jpg  
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  2. #2
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    earboth's Avatar
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    Quote Originally Posted by Twig View Post
    Hi

    Description in the attached picture.

    How can the ramp exert a force larger than the weight of the person !! (?)

    Also, I am not sure how to interpret the  \beta angle.
    Since \beta > \theta the body of the person is dragged down a little bit which explains why the force acting on the ramp is greater than the weight of the person.
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  3. #3
    Senior Member Twig's Avatar
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    Hi

    I dont get it.

    I interpret  \beta as the wire pointing 3 degrees above horizontal where his hands pull.

    I did: Free-body diagram of cart

    R - mg cos(\theta) = 0

     T - mg sin(\theta) = 0

    It doesnt work.

    Thx
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  4. #4
    Senior Member Twig's Avatar
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    Problem solved.
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