Find the work done by a force F= i + 5j+7k that moves an object from the point (1, 0, 3) to the point (7, 5, 10) along a straight line. The distance is measured in meters and the force in newtons. 80 J ○ 90 J ○ 100 J ☐ 110 J ☐ 120 J Suppose a=(6,8), b=28, and the angle between aand bis 60° Find a b ☐ 140 оо O О 140√3 70 280 -40

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