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 05-01-2012, 01:34 PM #1 Senior Member   Status: Pre-Medical Join Date: Nov 2011 Posts: 490 Aamc #9 SDN Members don't see this ad. (About Ads) This question was the difference between a 13 and a 14... THIS stupid freaking question Is it me or is this a totally loaded question? Which involves more work? I need not put any force on the wire for it to go from A to B. So 0 x distance = 0.... To lift it I must put a Force on the rope F x distance =/= 0 Is this ambiguity on their part or am I just being ridiculous?
 05-01-2012, 05:35 PM #2 Banned   Status: Pre-Podiatry MDApps: View Profile Join Date: Dec 2011 Posts: 18,777 Work is F*d. Draw a free body diagram and you will see 2 forces, force "F" and mg. Alternatively, it is simpler to just use conservation of energy.
 05-01-2012, 07:38 PM #3 Senior Member     Status: Pre-Medical Join Date: May 2008 Posts: 147 there are no non-conservative forces acting on the block, the pully thrown in there is a red herring in my view. E=E' mgh=mgh the only forces on the block before and after.

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