Using the formula
F = Gm1m2r2\; \frac{G m_1 m_2}{r^2}r2Gm1m2
= 6.67 × 10−11 × 3.0 × 2.0(50)2\; \frac{6.67 \; \times \; 10^{-11} \; \times \; 3.0 \; \times \; 2.0}{(50)^2}(50)26.67×10−11×3.0×2.0
= 40.02 × 10−112500\; \frac{40.02 \; \times \; 10^{-11}}{2500}250040.02×10−11
= 1.6 x 10−9^{-9}−9N
