According to three significant figures and include the appropriate units the net torque about the axle is 0 Nm.
The net torque about the axle is calculated by the sum of the individual torques from each force. Torque is defined as the product of force and perpendicular distance from the point of rotation.
Torque = F * r
Let's assume the force F1 is applied 2 inches from the axle and F2 is applied 4 inches from the axle.
F1 = 10 N
F2 = 5 N
Torque due to F1 = F1 * r1
= 10 N * 2 in
= 20 N-in
Torque due to F2 = F2 * r2
= 5 N * 4 in
= 20 N-in
The net torque = Torque due to F1 + Torque due to F2
= 20 N-in + 20 N-in
= 40 N-in
The net torque about the axle is 40 N-in.
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