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Thread: Force normal and force applied.

  1. #1
    Senior Member Vinod's Avatar
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    Force normal and force applied.

    A 10 kg block is at rest on a frictionless incline at $30^\circ$ to the horizontal, held in place by a rope attached to a mass hanging off the end of the incline.

    What is the mass of the block at the other end of the rope?
















    I think mass of the block at the other end of rope is 10kg. Is my answer correct? What do you think?
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  2. #2
    Forum Admin topsquark's Avatar
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    Re: Force normal and force applied.

    Quote Originally Posted by Vinod View Post
    A 10 kg block is at rest on a frictionless incline at $30^\circ$ to the horizontal, held in place by a rope attached to a mass hanging off the end of the incline.

    What is the mass of the block at the other end of the rope?
















    I think mass of the block at the other end of rope is 10kg. Is my answer correct? What do you think?
    Why do you say that?

    The force holding the unknown mass up is going to be the same as the force (due to gravity) pulling the 10 kg block down the incline. What is the magnitude of that force?

    -Dan
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  3. #3
    Senior Member Vinod's Avatar
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    Re: Force normal and force applied.

    Quote Originally Posted by topsquark View Post
    Why do you say that?

    The force holding the unknown mass up is going to be the same as the force (due to gravity) pulling the 10 kg block down the incline. What is the magnitude of that force?

    -Dan

    49N is the $F_{applied}$. So what would be a mass of unknown block?
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  4. #4
    Senior Member Vinod's Avatar
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    Re: Force normal and force applied.

    5kg mass of block
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