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Need help with inclined plane problem

by tricky_tick
Tags: inclined, plane
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tricky_tick
#1
Nov2-04, 08:20 AM
P: 6
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siddharth
#2
Nov2-04, 09:01 AM
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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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