AST 1002 Lecture Notes - Lecture 5: Net Force, Scientific Method, Astronomical Object
Document Summary
Motion and gravity gravity - gives the universe its structure. A universal force that causes all objects to pull on all other objs everywhere. Even dark matter has and responds to gravity. Galileo investigated this connection by using projectiles & balls rolling up + down planks. Discovered through galileo"s experiments w/ friction incorporated in newton"s first law of motion. A body continues in a state of rest/uniform in a straight line unless acted upon by other forces such as friction the moving earth - in conclusion, galileo believed that the earth was rotating. People thought that this couldnt be true bc if earth moved, how can bird get worm? solution: due to inertia, the bird is also rotating w/ the speed of the earth. A force is a push or a pull. Balanced forces = no change in motion orbital motion - newton was the first to spell out properties of gravity & write grav.
