15 be F The wheels shown in the figure, have radii a=10 cm and b=15 cm. Find the net torque on the wheel when three forces of magnitudes F1 = 20 N, F2 = 30 N, and F3 = 40 N are applied. O 4 N.m O +3 N. m O-3 N.m O +4 N. m O 400 N. m 2.
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