Body A pushes body B with a force

PHYSICS · Single correct · CBSE · Physics · Force and Laws of Motion · Force and Laws of Motion

Problem

Body A pushes body B with a force F⃗A→B=4 i^+9 j^ N\vec{F}_{A\to B}=4\,\hat{i}+9\,\hat{j}\,\text{N}. Which vector represents the force exerted on A by B? (a) −4 i^+9 j^ N-4\,\hat{i}+9\,\hat{j}\,\text{N} (b) −4 i^−9 j^ N-4\,\hat{i}-9\,\hat{j}\,\text{N} (c) 4 i^+9 j^ N4\,\hat{i}+9\,\hat{j}\,\text{N} (d) 9 i^+4 j^ N9\,\hat{i}+4\,\hat{j}\,\text{N}

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