Please help me to solve this question ​

Answer:

Gravitational force formula F = G × (m_A × m_B)/r^2

The mass of ball A and B are both 7 kg and the distance between those balls is 2 m. So,

F = G × (m_A × m_B)/r^2

F = 6.67 × 10^(-11) N m^2 kg^(-2) × (7 kg ×7 kg)/(2 m)^2

F = 8.17075 ×10^(-10) N ≈ 8.17 ×10^(-10) N