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A force ~F = (2.3 N) + (3.2 N)j is applied to an object that is pivoted about a fixed axis aligned along the z coordinate axis. The force is applied...

A force ~F = (2.3 N)ˆı + (3.2 N)ˆj is applied to
an object that is pivoted about a fixed axis
aligned along the z coordinate axis. The force
is applied at the point ~r = (4 m)ˆı+ (4.5 m)ˆj.
Find the z-component of the net torque.
Answer in units of Nm.

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