Question

Answer 1

\(2cm^2=0,0002m^2;180cm^2=0,018m^2\)

Ta có: \(\dfrac{F}{f}=\dfrac{S}{s}\Rightarrow F=\dfrac{f\cdot S}{s}=\dfrac{380\cdot0,018}{0,0002}=34200\left(N\right)\)

Chọn D

Answer 2

\(\dfrac{F}{f}=\dfrac{S}{s}\Rightarrow F=\dfrac{f\cdot S}{s}=\dfrac{380\cdot180}{2}=34200\left(N\right)\)

chọn D

Answer 3

Ta có: \(\dfrac{F}{f}=\dfrac{S}{s}\)\(\Rightarrow\dfrac{F}{380}=\dfrac{180}{2}\Rightarrow F=34200N\)

Chọn D.