Most cars have hydraulic brakes. when a person pushes on the brake pedal, a force is applied to a small piston with a cross-sectional area of 1.8 cm2. by pascal's principle, the pressure is transmitted through the brake fluid to two larger pistons (each with an area of 8 cm2). the larger pistons push on the brake pads and the brake pads rub against the rotor (which stops the car). when a force of 7.6 n is applied by the brake pedal to the small piston, what force (in n) does each of the larger pistons apply to the rotor?

Explanation:

By Pascal's law when we push the small piston by some force then our force will transmit same pressure in all direction

So we will have

here we know that

now we will have

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day