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Four point masses each of mass 'm' are p...

Four point masses each of mass 'm' are placed on the corner of square of side 'a' Calculate magnitude of gravitational force experienced each particle
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`F_(r) =` resultant force on each particle `=2F cos 45^(@) + F_(1)`
`=(2G.m^(2))/(a^(2)).(1)/(sqrt2)+(Gm^(2))/((sqrt(2a))2)= (G.m^(2))/(2a^(2))(2sqrt2+1)`
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