posted by Sara .
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?
There needs to be a figure associated wth this that shows the directions that the forces act. Do you know how to calculate the torque due to a force? That is what you should be learning.