ch21-p008 - 8. For ease of presentation (of the...

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() ( ) 22 2 2 00 || 1| | | | 1 sin 45 44 | | 2 y qQ qq Q F aa q a πε ⎛⎞ ⎜⎟ = ⎝⎠ which (if we demand F 2 y = 0) leads to /1 / 2 2 Qq =− . The result is inconsistent with that obtained in part (a). Thus, we are unable to construct an equilibrium configuration with this geometry, where the only forces present are given by Eq. 21-1. 8. For ease of presentation (of the computations below) we assume Q > 0 and q < 0 (although the final result does not depend on this particular choice).
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