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y2boodz6039
Joined: 12 Dec 2008
Posts: 3
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 Posted: Thu Jul 22, 2010 9:08 pm Post subject: |
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where do you get 0.02m from?
the passage says the spring is at 10cm at fully extended and 8cm fully compressed... so i thought the equilibrium position was at 9cm.
i know x is the distance from the equilibrium position so i used 0.01m in this problem (although there werent any answer choices that matched that so i just guessed)
thanks! |
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dnpgr16513
Joined: 14 Jun 2010
Posts: 75
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| Posted: Sun Aug 01, 2010 11:25 am Post subject: |
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F=-kx.
X signifies the distance away from the EQUILIBRIUM point. If 10cm = the total length of the string, and 8 cm = length of string when compressed you need to subtract the 2 to find the distance from the equilibrium.
10cm-8cm=2cm => .02 m |
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dltkdgn896512
Joined: 26 Jun 2010
Posts: 36
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| Posted: Fri Sep 02, 2011 1:16 pm Post subject: |
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| the fact that it was secured to a non-moving surface is a important clue |
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