Centripetal force (Fr) = MV2r\;\frac{MV^2}{r}rMV2
i.e. Fr = Mv2r\;\frac{Mv^2}{r}rMv2
= 9.1 × 10−31 × 2.0 × 106 × 2.0 × 1066.1 × 10−11\;\frac{9.1\; \times\; 10^{-31}\; \times\; 2.0\; \times\; 10^6\; \times\; 2.0\; \times\; 10^6}{6.1\; \times\; 10^{-11}}6.1×10−119.1×10−31×2.0×106×2.0×106 N
= ( 36.4 × 10−196.1 × 10−11\;\frac{36.4\; \times\; 10^{-19}}{6.1\; \times\; 10^{-11}}6.1×10−1136.4×10−19) N
= 5.967 x 10−8^\widehat{-8}−8 N
~ 6.0 x 10−8{}^{-8}−8 N
