$10.6 N m$
Work Step by Step
$| \tau|=|r \times f|= |r||f|sin \theta$ Given: $r$=18 cm =0.18 m, $f=60 N,\theta=80 ^ \circ$ $| \tau|=|r \times f|= |r||f|sin \theta$ $=0.18 \cdot 60 \cdot sin (80 ^ \circ)$ $ \tau =10.6 Nm$
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