Newton's Law:
Newton's Law of Gravity states that 'Every particle attracts every
other particle with a force that is proportional to the product of their masses and inversely
proportional to the distance between them.
Newton's Law of Gravity Formula:
Gravitational Force: 
Mass of Object 1: 
Mass of Object 2: 
Distance Between the Objects: 
where,
G = Universal Gravitational Constant = 6.6726 x 10-11N-m2/kg2
m1 = Mass of Object 1
m2 = Mass of Object 2
r = Distance Between the Objects.
Newton's Law of Gravity Examples:
Case 1: Determine the force of gravitational attraction between the earth 5.98 x 1024 kg
and a 70 kg boy who is standing at sea level, a distance of 6.38 x 106 m from earth's center.
m1 = 5.98 x 1024 kg, m1 = 70 kg, r = 6.38 x 106 m,
G = 6.6726 x 10-11N-m2/kg2.
Step 1: Substitute the values in the below Gravitational Force formula:
This example will guide you to calculate the Gravitational Force manually.
Case 2: Find the mass of one object if the magnitude of the gravitational force acting on each particle
is 2 x 10-8, the one mass is 25 kg and the objects are 1.2 meters apart
F = 2 x 10-8, m2 = 25 kg, r = 1.2 m, G = 6.6726 x
10-11N-m2/kg2.
Step 1: Substitute the values in the below Mass formula:
This example will guide you to calculate the Mass of the object manually.
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