dien tich pit-tong nho : s=\(\dfrac{d^2}{4}\times3,14=7,065\left(cm^2\right)=7,065\times10^{-4}\)(m^2)
luc nang F len pit-tong la : F=P=10m=10.2000=20000(N)
ap dung cong thuc : \(\dfrac{F}{f}=\dfrac{S}{s}\)
=> dien tich toi thieu cua pit-tong lon la :
S=\(\dfrac{20000}{100}\times7,065\times10^{-4}\approx0,14\left(m^2\right)\)
vay ...