Quiz1-2007-102

Quiz1-2007-102 - + = + = + = y x y x y x r r Q r r Q Q Q k...

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QUIZ1- SOLUTIONS Q1 Q2 x y F 12 F 32 Q3 r x r y In order to have Q2 at equilibrium, 0 32 12 = + = F F F net where 12 F is the force act on Q2 due to Q1 and 32 F is the force act on Q2 due to Q3. 12 32 F F = , Q3 is somewhere that the forces are oppositely directed. 2 1 4 2 1 ) ( 3 ) 2 ( 2 1 )) ( ( 2 3 2 2 2 2 2 2 2 2 12 32 =
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Unformatted text preview: + = + = + = y x y x y x r r Q r r Q Q Q k r r Q Q k F F r x =r y =a since 12 F and 32 F must be on the same line to cancel each other. 2 4 8 2 2 2 = = = = = y x r r a a a So, the coordinates of Q3 is x= -1cm, y= -1cm...
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