Three forces of equal magnitude are applied to a $3\,\text{m} \times 2\,\text{m}$ rectangle. Force $F_1$ and $F_2$ act at $45^\circ$ angles to the vertical as shown, while $F_3$ acts horizontally.
In short:

$F_1$: applied at $(0, -2)$, direction SW $45^\circ$
$F_2$: applied at $(2, -2)$, direction NW $45^\circ$
$F_3$: applied at $(3, -1)$, direction east

Points of rotation: $A = (0, 0)$, $B = (0, -1)$, $C = (1, -1)$

Question

Three forces of equal magnitude are applied to a $3\,\text{m} \times 2\,\text{m}$ rectangle. Force $F_1$ and $F_2$ act at $45^\circ$ angles to the vertical as shown, while $F_3$ acts horizontally.
In short:

$F_1$: applied at $(0, -2)$, direction SW $45^\circ$
$F_2$: applied at $(2, -2)$, direction NW $45^\circ$
$F_3$: applied at $(3, -1)$, direction east

Points of rotation: $A = (0, 0)$, $B = (0, -1)$, $C = (1, -1)$(a) Calculate the net torque about Point $A$. Is the net torque about Point $A$ clockwise, counterclockwise, or zero? Explain your reasoning.
, (b) Calculate the net torque about Point $B$. Is the net torque about Point $B$ clockwise, counterclockwise, or zero? Explain your reasoning.
, (c) Calculate the net torque about Point $C$. Is the net torque about Point $C$ clockwise, counterclockwise, or zero? Explain your reasoning.
:

Rachel · Accepted Answer

$\tau_{\text{net},A}=(1-\sqrt2)F\;\text{Nm}\;\text{(clockwise)},\;\tau_{\text{net},B}=0\;\text{Nm},\;\tau_{\text{net},C}=0\;\text{Nm}$

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