state the importance of umiversal law of gravitation. with example
The universal law of gravitation: Every object in the universe attracts every other object with a force which is proportional to the product of their masses and inversely proportional to the square of the distance between them.
The force is along the line joining the centres of two objects.
The importance of universal law of gravitation lies in the fact that it was successful in explaining many phenomena such as:
1)The gravitational force of attraction of the Earth binds all terrestrial objects to the Earth
2) The gravitational force of earth keeps the atmosphere close to earth
3) The moon revolve around the earth
4) The gravitational pull of the sun on the planet keeps them revolving around the sun
5) The tides formed by the rising & falling of water level in the oceans are due to the gravitational force of sun & moon on the water.