Six point masses each of mass \( m \) are placed at the \( \mathrm{...

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Six point masses each of mass \( m \) are placed at the
\( \mathrm{P} \) vertices of a regular hexagon of side \( l \). The force

W acting on any of the masses is
(a) \( \frac{G m^{2}}{l^{2}}\left[\frac{5}{4}+\frac{1}{\sqrt{3}}\right] \)
(b) \( \frac{G m^{2}}{l^{2}}\left[\frac{3}{4}+\frac{1}{\sqrt{3}}\right] \)
(c) \( \frac{G m^{2}}{l^{2}}\left[\frac{5}{4}-\frac{1}{\sqrt{3}}\right] \)
(d) \( \frac{G m^{2}}{l^{2}}\left[\frac{3}{4}-\frac{1}{\sqrt{3}}\right] \)
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