A triangular plate is shown. A force → F = 4 ^ i - 3 ^ j is applied...

\overset{\to}{F} = 4\overset{^}{i} - 3\overset{^}{j}

\overset{\to}{r}1 = 5\overset{^}{i} + 5\sqrt{3}\overset{^}{j} and \overset{\to}{r}2 = - 5\overset{^}{i} + 5\sqrt{3}\overset{^}{j}

Torque about $' O '$

\overset{\to}{τ}O = \overset{\to}{r}1 \times \overset{\to}{F} = \left(- 15 - 20\sqrt{3}\right)\overset{^}{k}

Torque about $' Q '$

\overset{\to}{τ}Q = \overset{\to}{r}2 \times \overset{\to}{F} = \left(15 - 20\sqrt{3}\right)\overset{^}{k}