Textbook: University Physics by Young & Freedman; torque analysis on a metal bar

A metal bar is in the xy plane with one end of the bar at the origin. A force F=(7.00N)i+(-3.00N)j is applied to the bar at the point x=3.00m, y=4.00m. (a) In terms of unit vectors i and j, what is the position vector r for the point where the force is applied? (b) What are the magnitude and directi

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