A force of magnitude acts at an angle of above the positive x-axis in the -plane

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A force of magnitude 10 N10\,\text{N} acts at an angle of 30∘30^{\circ} above the positive x-axis in the xyxy-plane. Express the reaction force in unit-vector form. (a) 53 i^+5 j^ N5\sqrt3\,\hat i+5\,\hat j\,\text{N} (b) 53 i^−5 j^ N5\sqrt3\,\hat i-5\,\hat j\,\text{N} (c) −53 i^−5 j^ N-5\sqrt3\,\hat i-5\,\hat j\,\text{N} (d) −5 i^−53 j^ N-5\,\hat i-5\sqrt3\,\hat j\,\text{N}

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