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basic physics - pushing box up a hill

Posted on 2010-08-25
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Hi

If a man is pushing a box up a hill using a horizontal force, why is the angle in the diagram equal to theta? Is it because the angles are alternate angles of a pair of parallel lines (Fpush and the ground are parallel)

thanks
push.jpg
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Question by:andieje
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phoffric earned 500 total points
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>> Is it because the angles are alternate angles of a pair of parallel lines
Yes, alternate interior angle theorem:
    http://www.mathsisfun.com/geometry/alternate-interior-angles.html
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by:Timothy McCartney
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Yes, because you break Fp into the X and Y dimensions in relation to hill, you create like angles where the hill meets 0 (the ground) and Fp meets the hill at X,Y. Thus you have Fpy, Fpx, and Fp creating a right triangle
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by:andieje
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good oh!
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