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Need help with inclined plane problem

  1. Nov 2, 2004 #1
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    Last edited: Nov 2, 2004
  2. jcsd
  3. Nov 2, 2004 #2


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    Work is Force X Displacement. Now Work is minimum when the net force is minimum
    By drawing the Free Body Diagram for the block, you would arrive at
    [tex] 0=ma=F - mg \sin \alpha - \mu mg \cos \alpha [/tex]
    Differentiating F with respect to alpha and equating to zero you would get the required result
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