Three identical point masses

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Three identical point masses, each of mass 1 kg lie in the x-y plane at points (0, 0) (0, 0.2m) and (0.2m, 0). The gravitational force on the mass at the origin is :- (A) 1.67×10−11(i^+j^)N1.67\times 10^{-11}(\hat{i}+\hat{j})\text{N} (B) 3.34×10−10(i^+j^)N3.34\times 10^{-10}(\hat{i}+\hat{j})\text{N} (C) 1.67×10−9(i^+j^)N1.67\times 10^{-9}(\hat{i}+\hat{j})\text{N} (D) 3.34×10−10(i^−j^)N3.34\times 10^{-10}(\hat{i}-\hat{j})\text{N}

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