Question

mention the importance of universal law of gravitation

Answer 1

The most important part about this is not only that objects pull on each other, but that two objects attract each other with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between them. This is known as Newton's law of universal gravitation.

Answer 2

1)we can understand how and why the planets revolve around the sun and how satellite revolved around the planets

2)it explains how the planets are held by the sun and why don't they fall on sun

3)it can also explain how is tided formed of earth , it can be due to the gravitational forces of sun moon etc as there will be low tides on no moon day and high tides on new moon day

4)it can also explain how far the gravitational force exists between the bodies in the universe 

5)gravity in different planets is different and there is a universal gravitational constant whose values is 6.674 x 10¬11