Depressing the brake pedal in a carpushes on a piston with cross-sectional area 3.0cm2.the
piston applies pressure to the brake fluid, which is connected totwo pistons, each with area 12.0
cm2. each of these pistonspresses a brake pad against one side of a rotor attached to one ofthe
rotating wheels (the figure below )when the force applied by the brake pedal to thesmall
piston is 7.5 n, what is the normalforce applied to each side of the rotor? (b) if the coefficientof
kinetic friction between a brake pad andthe rotor is 0.80 and each pad is (on average) 12 cmfrom
the rotation axis of the rotor, what isthe torque on the rotor due to the two pads?