\(R=10cm=0,1m\)
Thể tích phần chìm:
\(V_{chìm}=\dfrac{4}{3}\pi\cdot R^3=\dfrac{4}{3}\cdot\pi\cdot0,1^3=\dfrac{1}{750}\pi\left(m^3\right)\)
\(D_{dầu}=800\)kg/m3\(\Rightarrow d_{dầu}=10D=8000\)N/m3
\(F_A=V\cdot d_{dầu}=\dfrac{1}{750}\pi\cdot8000=\dfrac{32}{3}\pi\left(N\right)\approx33,51N\)