The gravity of Earth is attracting a person towards the center with 500N of gravitational force. The person is exerting a reactionary force on the Earth with how much force? Explain your thinking behind this.

Ex 9.2 Gravitational force acts on all bodies in proportion to their masses. ... Does the more massive Earth attract the less massive Moon with a force that is greater, ... Remember Newton's Third Law, Action and Reaction, F12 = - F21 ? ... seem that a body on the surface of Jupiter would weigh 300 times as much as on Earth.

Explanation:

Ex 9.2 Gravitational force acts on all bodies in proportion to their masses. ... Does the more massive Earth attract the less massive Moon with a force that is greater, ... Remember Newton's Third Law, Action and Reaction, F12 = - F21 ? ... seem that a body on the surface of Jupiter would weigh 300 times as much as on Earth.

this allows people to make the best decision or pursue the best option. when alternatives are weighed using their advantages and disadvantages, the option whose disadvantages outweigh the advantages (based on a qualitative or quantitative analysis) are shunned while those whose advantages outweigh their disadvantages are pursued.  

the answer would be   dignified - apex