Sir Isaac Newton was in my mind one of the greatest people who ever lived. He was born in 1642 and died in 1727. He formulated three laws of motion that help explain some very important principles of physics. Some of Newton's laws could only be proved under certain conditions; actual observations and experiments made sure that they are true. Newton's laws tell us how objects move by describing the relationship between force and motion. I am going to try to explain his first law in more simple terms. Newton's first law of motion states: ....