d unit : choose EM-dist (or Earth-Moon distance, equal to `3.844*10^8` m).m 2 unit : choose MM (or mass of the Moon, equal to `7.342 × 10^22` kg).m 1 unit : choose ME (or mass of the Earth, equal to `5.972 × 10^24` kg).Unit of F : choose N (Newton) or whatever appropriate unit.Gravitational force F : input x or leave empty (this is the variable to calculate).To evaluate this force with the calculator, enter the following values, Let's calculate the gravitational force between the Earth and the Moon, first with the formula then with the calculator above. G is the universal gravitational constant whose value is,Įxample 1. These forces have the same intensity F equal to,į is the force of attraction between the two bodies in Newton,ĭ is the distance between the two bodies in meter. ![]() ![]() The forces exerted by body 1 on body 2 (`\vecF_12`) and vice versa by body 2 on body 1 (`\vecF_21`) are vector opposite,.According to the universal law of gravitation formulated by Isaac Newton in 1687, two bodies of mass `m_1` and `m_2` spaced at distance d, exert one on the other a force of attraction according to the following laws :
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