problem21_18

# University Physics with Modern Physics with Mastering Physics (11th Edition)

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21.18: The charge 3 q must be to the right of the origin; otherwise both 3 2 and q q would exert forces in the + x direction. Calculating the magnitude of the two forces: direction. in the N 375 . 3 m) 200 . 0 ( C) 10 00 . 5 C)( 10 00 . 3 )( C m N 10 9 ( 4 1 2 6 6 2 2 9 2 12 2 1 0 21 x r q q πε F + = × × × = = - - direction the in m N 216 . 0 C) 10 00 . 8 ( C) 10 00 . 3 ( ) C m N 10 9 ( 2 13 2 2 13 6 6 2 3 9 31
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Unformatted text preview: F-⋅ = × × ⋅ × =--We need : N 00 . 7 31 21-=-F F N 00 . 7 m N 0.216 N 375 . 3 2 13 2-= ⋅-r origin the of right the to m 144 . m 0208 . N 7.00 N 3.375 m N 216 . 13 2 2 2 13 = = + ⋅ = r r...
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