wikiHow Calculating Force of Gravity Practice Problems Note: Use the formula Fg = G x (m1 x m2) / r^2 to calculate the force of gravity. The gravitational constant (G) is 6.674 x 10^-11 N m^2/kg^2. Round the answers to two decimal places if necessary. 1. Two objects with masses of 10 kg and 20 kg are 5 m apart. What is the force of gravity between them? 2. Two objects with masses of 5 kg and 10 kg are 2 m apart. What is the force of gravity between them? 3. Two objects with masses of 2 kg and 8 kg are 4 m apart. What is the force of gravity between them? 4. Two objects with masses of 50 kg and 100 kg are 10 m apart. What is the force of gravity between them? 5. Two objects with masses of 15 kg and 30 kg are 6 m apart. What is the force of gravity between them? 6. Two objects with masses of 25 kg and 50 kg are 8 m apart. What is the force of gravity between them? 7. Two objects with masses of 20 kg and 40 kg are 7 m apart. What is the force of gravity between them? 8. Two objects with masses of 7 kg and 14 kg are 3 m apart. What is the force of gravity between them? 9. Two objects with masses of 100 kg and 200 kg are 12 m apart. What is the force of gravity between them? 10. Two objects with masses of 30 kg and 60 kg are 9 m apart. What is the force of gravity between them? 11. Two objects with masses of 4 kg and 16 kg are 2.5 m apart. What is the force of gravity between them? 12. Two objects with masses of 75 kg and 150 kg are 11 m apart. What is the force of gravity between them? 13. Two objects with masses of 12 kg and 24 kg are 4 m apart. What is the force of gravity between them? 14. Two objects with masses of 6 kg and 12 kg are 3 m apart. What is the force of gravity between them? 15. Two objects with masses of 200 kg and 400 kg are 15 m apart. What is the force of gravity between them? 16. Two objects with masses of 10 kg and 40 kg are 4 m apart. What is the force of gravity between them? 17. Two objects with masses of 8 kg and 32 kg are 3.5 m apart. What is the force of gravity between them? 18. Two objects with masses of 150 kg and 300 kg are 18 m apart. What is the force of gravity between them? 19. Two objects with masses of 20 kg and 80 kg are 5 m apart. What is the force of gravity between them? 20. Two objects with masses of 18 kg and 72 kg are 6 m apart. What is the force of gravity between them? Page