Gravity is one of the forces of nature that can be said to be a i¿½fundamental as well as universal force of naturei¿½, which, according to scientists, is one of the four forces of nature, namely, strong, weak, electromagnetic and gravitational. Physicists, to date have not been able to form a single formula that would explain all these forces of which gravity is one, as one single law. However, it is a fact that physicists have formulated a formula that mentions weak and electromagnetic forces, or in other words, the electroweak force. The other stronger gravitational forces have not been explained, however, with this theory. (i¿½Fundamental Forcesi¿½, n. d.) Gravity can be explained as an attractive force between all matters, and is considered to be one of the weaker forces. The reason why gravity is a weak force of nature is that its gravitational force depends upon the mass of the objects. For example, it is only when the object has a large mass that the attraction is larger, and the Earth is one such object. (i¿½Gravity Definition Pagei¿½, n. d.)
             It was Sir Isaac Newton who was able to give a mathematical definition to gravity, and he achieved this through his i¿½law of universal gravitationi¿½. According to this law, gravity is found to be at its strongest among two very massive objects, and gets weaker since these objects get apart, and this concept can be explained by the theory of i¿½escape velocityi¿½. This theory purports that an object would need a particular level of velocity if it were to escape the gravitational pull of that of another object, like for example, the Earth. When Newtoni¿½s gravitational law is applied to the theory of escape velocity, and also add the measurements that one already possesses for the Earth, then one would be able to understand that the Earthi¿½s escape velocity would be about 11 km/s. This can be taken to mean that if one were to throw a baseball at 11 km/s, it wou...