I drew Newton's Three Laws of motion as little babies... something different! In the year 1687, "Philosphae Naturalis Principia Mathematica", or "Mathematical Principles of Natural Philosophy" was written by Sir Isaac Newton. In this book, Newton layed down the Three Laws of Motion, which are fundamental to our understanding of the universe to this day. The first law states that unless a body is acted upon by an unbalanced force, it's state of motion will be constant. This means that in the universe, all bodies travel with uniform motion when the forces acting on them are balanced. Makes sense, right? If a body is at rest, it is still in a state of motion. All the forces acting on it cancel each other out, so there is no change in the motion of the body. The second law states that a net force will cause a body of mass to accelerate. Acceleration is a change in speed over some time period, therefore a force changes the motion of a body with mass, it does not cause motion. We have established in the first law that all objects in the universe are always in a state of motion, even when they are at rest. The second law states that, when a body is traveling with uniform motion (ie all forces acting on it are balanced), only a net force can change its motion. The net force would have to be greater than the total sum of all forces keeping the body in uniform motion. The resulting magnitude of force the body experiences would be the net force minus the sum of all forces acting on the body when the motion of the body was constant. The direction in which the body would change its motion would be the direction of the net force. The third law states that for every force, the is a force that is equal in magnitude but opposite in direction. If Object A exerts a force on Object B, Object B exerts an equal but opposite force on Object A. Objects can move because at any given time, there are more than just these equal and opposite forces acting on the body. The resulting net force allows objects to still change their motion. #SirIsaacNewton #threelawsofmotion #newtonslawsofmotion #thefirstlaw #thesecondlaw #principia #forces #motion #acceleration #physics #science #sciences
