(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The area of the piston in the master cylinder is 1.8cm^2, and that of the piston in the brake cylinder is 6.4cm^2. The coefficient of friction between shoe and wheel drum is .50. If the wheel has a radius of 34cm, determine the frictional torque about the axle when a force of 44N is exerted on the brake pedal.

(Pedal)--[master cylinder]-----[brake cylinder]-----(shoe)Wheel drum

2. Relevant equations

torque=rF

F1=(A1/A2)F2

F=(mu)*normal force

1.8cm^2=1.8X10^-4m^2

6.4cm^2=6.4X10^-4m^2

radius=34cm=.34m

3. The attempt at a solution

I solved for F2 and got 12.4N. Is this the force that the shoe exerts on the wheel drum?

If that is correct, how do i go about solving for the torque?

thank you

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# Homework Help: Hydraulic brake system

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