Essay Sir Isaac Newtons Three Laws of Motion - 1373 Words

We have all heard the story of the apple falling on Newtons head while he was sitting against the tree, thus giving him the sudden idea for the Universal Law of Gravity. This, as I am sure most of us know, is not really what happened. A more accurate version would probably be, Newton observed an apple falling from a tree and started contemplating the physics of the apples fall. The acceleration experienced by the apple, which started at zero when hanging in the tree, then increased as the apple fell. This as Newton reasoned from his second law of motion, means there must be a force acting upon the apple in order to cause the acceleration, this force we will call gravity. Thus giving us the acceleration due to this force†¦show more content†¦From this we are able to tell that if an object is either accelerating or decelerating than an external force must be acting on it even if it is simply the force of gravity, air resistance, or friction. Newtons 2nd Law This is probably the most known of all three of Newtons Laws of motion. * The acceleration of an object is directly proportional to the net force acting on it, while being inversely proportional to its mass. More often though we see this law written as; Fnet = ma Where F equals the net force on the object in Newtons, m equals the mass in kilograms and a equals the acceleration of the object in meters/second^2. Since force is a vector this can be rewritten in three separate equations to take into account direction; Fx = ma, Fy = ma, Fz = ma Fnet = Fx + FY+ Fz We must also remember that acceleration as well is a vector and therefor has three components just like the force. When learning how to use Newtons 2nd Law, however, one usually only uses examples where there is only two directional forces acting on an object. These are usually the x-direction (side to side) and the y-direction (up and down). For now we are only going to take into account these two components. This law is very useful in the fact we can determine the acceleration of an object if we know the forces acting on it as well as itsShow MoreRelatedSir Isaac Newton was one of the greatest physicist and mathematicians of all time. He was born in1600 Words   |  7 PagesSir Isaac Newton was one of the greatest physicist and mathematicians of all time. He was born in England on December 25, 1642 on Christmas. He died at the age of eighty four on March 20, 1727. Newton was never married and never had any children. Though he did have three siblings from his mother’s second marriage. Some of Newton’s achievements in physics and mathematics are; Newton’s law of universal gravitation, Newton’s three laws of motion, calculus, refraction of light, reflecting telescopeRead MoreThe Genius Of Sir Isaac Newton1687 Words   |  7 Pages History has had its fair share of phenomenal scientists, but none can overshadow the genius of Sir Isaac Newton. Isaac Newton was born on January 4, 1643. 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