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admin
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Joined: 08 Dec 2003
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 Posted: Sat Jun 23, 2007 3:03 pm Post subject: |
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| The question provides information for you to construct a triangle with 4 as the horizontal, 3 as the vertical meaning (using the Pythagorean theorem) that 5 would be the hypotenuse. Cosine theta (for the horizontal component) would therefore be given by adj/hyp or 4/5. |
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mcat_premed3832
Joined: 19 Oct 2006
Posts: 428
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| Posted: Sat Jul 11, 2009 1:48 am Post subject: |
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As you mentioned, you can use the equation because "the units match up" or, formally, dimensional analysis.
But indeed, it is one of the equations of kinematics:
Vf = Vo + at
so if Vf is 0 (for an instant at the max. height when changing directions) and we are examining the vertical acceleration -g,
0 = Vo - gt
or t = Vo/g |
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admin
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| Posted: Thu Jul 30, 2009 3:26 pm Post subject: |
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| Bump. |
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boshenliu34457
Joined: 20 Jul 2011
Posts: 9
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| Posted: Sun Aug 14, 2011 11:47 am Post subject: |
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| but the question also mentioned "in the absense of gravity", so doesn't that mean g=0? |
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dltkdgn896512
Joined: 26 Jun 2010
Posts: 25
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| Posted: Thu Aug 25, 2011 3:28 pm Post subject: |
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| ez pz lemon squeezy |
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