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Math Help - Simple pulley system question

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    Member Chokfull's Avatar
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    Simple pulley system question

    This one problem makes no sense to me; I have a pulley system, one pulley attached to the ceiling with the rope running over it, and the other pulley hanging on the rope with a cylinder attached to it. The system looks like this horrible diagram over here.Simple pulley system question-pulley2-copy.jpg How does the twenty-kilogram cylinder balance with a 10-kilogram cylinder hung on the left side of the rope?
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    Quote Originally Posted by Chokfull View Post
    This one problem makes no sense to me; I have a pulley system, one pulley attached to the ceiling with the rope running over it, and the other pulley hanging on the rope with a cylinder attached to it. The system looks like this horrible diagram over here.Click image for larger version. 

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ID:	19398 How does the twenty-kilogram cylinder balance with a 10-kilogram cylinder hung on the left side of the rope?
    1. I've modified your sketch a little bit.

    2. The load of 20g ist distributed on two strings which both have to hold half of the load.

    3. What you didn't take into account: The ceiling is pulling up with 10g and therefore the other side of the rope must be pulled with 10g too to keep the whole system in equilibrium.
    Attached Thumbnails Attached Thumbnails Simple pulley system question-einscheibenflaschenzug.png  
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