Question

The figure below shows, in simplified form, the system of
disc brakes of an automobile. By pressing the pedal
of the brake, it pushes the piston of a first piston which,
in turn, through the hydraulic circuit oil, pushes
a second piston. The second piston presses a
brake pad against a metal disc attached to the wheel,
causing it to slow its angular velocity.

Pastilha de freio Oleo de freio Pedal de freio Disco de freio

Considering the diameter d2 of the second piston twice the diameter d1 of the first, what is the ratio between the force applied to the brake pedal by the driver's foot and the force applied to the brake pad?

Answer 1

de=ad, consider 2 points 0 e as shown in fig. Since there thuid es confined ( enclosed by a piston) so as per pascal's law, pressure is. transmitted equally in all direction in case of confined fluid .: Pi = Pz = &. A Az .