Question: A force 18 i + 18 j N acts on a bar at a point which is described by the position vector 4 i -

A force 18 i + 18 j N acts on a bar at a point which is described by the position vector 4 i - 8 j m where the tail of this vector is at the position of the axis of rotation of the bar. The magnitude of thetorque acting on the bar __Nm

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