What is Law of Universal Gravitation in Physics

Law of Universal Gravitation in Physics




Newton proposed the theory that all objects in the universe attract if each other with a force known as gravitation. The gravitational attraction exists between all bodies. Hence, two stones are not only attracted towards the earth, but also towards each other.




Everybody in the universe attracts every other body with a force, which is directly proportional to the product of masses and inversely proportional to the square of the distance between their centers.


Mathematical Expression:


Two objects having mass ml and m2 are placed at a distance r. According to Newton’s Law of Universal Gravitation


F < m1m2 ((Here < represents the sign of proportionality do not write this in your examination)


Also F < l/r2 (Here 2 represents square of r)


Combining both the equations:


F < m1m2/r2


Removing the sign of proportionality and introducing a constant:

See also  9th Class Biology Notes Chapter 6


F = G (m1m2/r2)


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