Explanation Given info: The area of the piston is 1.8 cm 2 , the area of the brake is 6.4 cm 2 , the coefficient of friction is 0.50 radius of wheel is 34 cm and the applied force is 44 N Write the Pascal’s principle, F 2 A 2 = F 1 A 1 Here, F 2 is the force applied on the break cylinder. F 1 is the force applied on the piston in the master cylinder. A 2 is the area of piston in the break cylinder. A 1 is the area of piston in the master cylinder. Rearrange the above expression for F 2 . F 2 = A 2 A 1 F 1 Substitute 6.4 cm 2 for A 2 , 1.8 cm 2 for A 1 and 44 N for F 1 in the above equation. F 2 = 6.4 cm 2 1

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ISBN: 8220100461262

Author: SERWAY

Publisher: Cengage Learning US

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Variation of pressure

From the equation of pressure, pressure is directly proportional to the applied force.

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Chapter 14, Problem 14.75AP

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The frictional torque about the axle.

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The frictional torque about the axle.

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