The gravitational force between two objects of masses m_1 and m_2 that are separated by distance r is:

Explanation:

Gravitational force is the force of attraction that exist between two bodies having certain mass . It is proportional to the product of mass of two objects interacting with each other and inversely proportional to the square of the distance between them.

if and  are the mass of object then Gravitational force is given by

where r=distance between them

G=gravitational constant  

i think they are all correct

explanation:

they seem good

the inner core.

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