Brake Work Example 15

ACT Work Keys Level: 7
NATEF Task(s): V.B.1

Problem:

1. Describe the output force of a brake pedal lever if the driver is exerting 50 # on a brake pedal that is 10" from pedal to pivot and 1.25" from the pivot to the Master cylinder plunger rod. (Show your work and circle the answer.)

2. Describe the output force of a system if an input force of 400 # is exerted on a 1-inch-diameter input piston and the output piston has a 3.25-inch diameter. (Show your work and circle the answer.)

3. Describe the output force of a brake pedal lever if the driver is exerting 30 # on a brake pedal that is 8" from pedal to pivot and 0.5" from the pivot to the Master cylinder plunger rod. (Show your work and circle the answer.)

Solution :