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Thread: Proof question... help lol

  1. #1 Proof question... help lol 
    Forum Freshman
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    Jan 2008
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    hey, ive been looking at some questions on the internet and i came across this one....here is the link http://www.saburchill.com/physics/qu...quest0193.html
    its question 2 by the way.... the first question was easy. just dont know where to start .
    thanks a lot, Rhys.


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  3. #2  
    Forum Freshman
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    sorry for bumping...its really annoying me now, :P


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  4. #3  
    Forum Radioactive Isotope MagiMaster's Avatar
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    I can't help you too much with your question right now, other than to suggest drawing a free-body diagram at a couple of different points and writing out the equations and figuring out what you know and don't know, but I can offer one suggestion. This is a forum where people come once or twice a day when they have time, so bumping after just 30 minutes is completely pointless. Give it at least a day or two before bumping. Also, it's generally a good idea to show what work you've done, as that generally gets more and better responses.
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  5. #4  
    Moderator Moderator Dishmaster's Avatar
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    Try writing down an equation that puts potential and kinetic energy in equilibrium. Then try to modify it by introducing a term that includes friction. The friction "absorbs" some potential energy on the expense of kinetic energy. Use trigonometry to make the directions of gravity and movement parallel.
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