A force vector has components and

MATHEMATICS · Single correct · AP · AP Precalculus · Functions with Parameters, Vectors, and Matrices · Functions with Parameters, Vectors, and Matrices

Problem

A force vector has components Ax=6.0×102 NA_x = 6.0\times10^{2}\,\text N and Ay=−8.0×102 NA_y = -8.0\times10^{2}\,\text N. Which of the following is the unit vector a^\hat a in the direction of the force? (a) 0.75 i^−0.66 j^0.75\,\hat i - 0.66\,\hat j (b) 0.60 i^−0.80 j^0.60\,\hat i - 0.80\,\hat j (c) 0.60 i^+0.80 j^0.60\,\hat i + 0.80\,\hat j (d) 0.80 i^−0.60 j^0.80\,\hat i - 0.60\,\hat j

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