The 17.9 cm diameter disk rotates on an axle through its center. F1=22.1 N, F2=32.4 N, F3=32.4 N, F4=22.1 N, and d=4.74 cm. What is the net torque about the axle?

From the description, one cannot assertain what the forces are, where they act, and in what directions.

Net torque=sum of crossproduct of force, distance.

NMNMNMN

To find the net torque about the axle, we need to calculate the torque produced by each of the forces and then add them together.

The torque produced by a force can be calculated using the formula:

Torque = Force × Distance

Where,
Torque is measured in Newton-meters (Nm),
Force is measured in Newtons (N),
Distance is measured in meters (m).

Given:
F1 = 22.1 N
F2 = 32.4 N
F3 = 32.4 N
F4 = 22.1 N
d = 4.74 cm = 0.0474 m (converted to meters)

Now, let's calculate the torque for each force:

Torque1 = F1 × d
Torque2 = F2 × d
Torque3 = F3 × d
Torque4 = F4 × d

Finally, we can find the net torque by summing up the individual torques:

Net Torque = Torque1 + Torque2 + Torque3 + Torque4

You can substitute the given values into the equations and perform the calculations to find the net torque.