A55 kg cheerleader uses an oil-filled hydraulic lift to hold four 110 kg football players at a height of 1.0 m. if her piston is 16 cm in diameter, what is the diameter of the football players’ piston?

Explanation:

As we know that the total mass of the all four players is given as

diameter of the piston of cheer leader is given as

are of cross-section is given as

mass of the cheer leader is given as

m = 55 kg

so the pressure due to cheer leader is given as

Now on the other side pressure must be same

so we have

so diameter on the other side is given as

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