In ancient Greece the word motion means the change in quantity over a period of time as well as not just the movement of a body from one position to another. But today what we see has bit different meaning which tells even more about displacement, velocity, time variation etc. Force could be observed in all quantities as well as it could vary from barely noticeable to something which is huge in quantum. Force also causes motion as well as the study of these is the branch of Physics better known as Mechanics. These two topics are very important in today’s contemporary world as almost everything around us involves these two factors in some manner or other. Almost everything around us is in motion as well as motion could take various forms. They move in straight line, a curvilinear pathway, spin around a particular axis or make to as well as fro movements. Force simply put means something that can help in push or pull as well as for every push, pull; twist or stretch the application of force is ultimate. Forces also keep tiny atoms together which makes up everything else in this Universe. Any particular object if moves would come to rest only due to the fact that of force. An object can go faster or slower when force is applied In Physics it is proven that different forces in this Universe belong to one of the four basic kinds. These are gravitational force, electromagnetic force as well as the two atomic forces. Gravitational force helps in keeping everything on Earth intact as well as keeps the Earth in orbit, while magnetic force as well as chemical forces is included under electromagnetic force. The two atomic forces hold the nucleus of an atom in place without which the atom would disintegrate. To describe motion one has to know speed as well as direction. Speed is about how fast a body moves as well as in relative to either a stationary object or other moving objects. To describe motion we also need to clarify the direction in which the body is moving. Speed with direction gives us velocity. The change in motion of a body is due to unbalanced force in action while a constant motion is the resultant of a balanced force. In constant motion the friction force tends to be minimal or almost close to zero Motion of falling objects: Galileo long ago discovered something very important as well as it was about falling objects. He discovered that the force acting on massive objects is more than the force acting on less massive objects as well as hence both will reach the ground at the same time if dropped from a height at the same instant. He also concluded that if forces were same then the object with less mass would reach first. In principle all objects will reach the ground at the same time provided there is no air resistance. Balanced as well as unbalanced forces are yet another way of checking Newton’s first law of motion. The first law states that a body will remain at rest or motion until an external force is applied to either set it in motion or bring it to rest. Unless there is an external unbalanced force is applied nothing could be completed. When a book is kept on a table it remains at rest due to the fact that the force of gravity pushes the book down as well as an equal amount of force is pushing it up. As the forces working on book are balanced the book stays in one place. Similarly a body is in constant motion when the body has balanced force with respect to frictional force as well as the body keeps on moving until another unbalanced force stops it. . . . . . . . . .