An engineer pulls a cable with a constant force

PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

An engineer pulls a cable with a constant force F⃗=2i−3j+6k kN\vec F = 2\mathbf{i} - 3\mathbf{j} + 6\mathbf{k}\,\text{kN}. The end of the cable moves from point P(1,−2,0)P(1,-2,0) m to Q(4,1,2)Q(4,1,2) m and then to R(6,5,5)R(6,5,5) m. (a) Work from PP to QQ (b) Additional work from QQ to RR (c) Total work from PP to RR

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