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Question

Four particles, each of mass m, are placed at the four corners of a square of side 'a'. Force exerted by this system on another particle of mass m placed at the midpoint of a side of square is -

A
16Gm255a2
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B
16Gm253a2
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C
16Gm25a
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D
zero
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Solution

The correct option is D zero


FA=Gmma2

=24m2a

Fc=4mma2=24m2a

Fc=FA&FB=FA

So, all are equal and opp. so zero


1095094_1112196_ans_b15e42258fdb4853a2345417547e5b11.JPG

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