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The body shown in Fig. is pivoted at poi...

The body shown in Fig. is pivoted at point `O`. Three forces act on it `F_(a) = 10N` at point `A, 8.0 m` from `O, F_(b) = 16 N` at` B, 4.0m` from O, and `F_(c) = 19 N` at `C, 3.0 m` from `O`. What is the net torque about `O`.

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`12N*m`
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