ASTR 1000 Lecture Notes - Lecture 5: Angular Momentum, Net Force, Thermal Energy
Document Summary
All falling objects accelerate at the same rate (not couning fricion of air resistance). Galileo showed that g is the same for all falling objects, regardless of their mass. A net force changes momentum, which generally means an acceleraion (change in velocity). Rotaional momentum of a spinning or orbiing object is known as angular momentum. Mass the amount of mater in an object (apparent) weight the force that acts upon an object. Apparent weightlessness is due to a constant state of free-fall. Realized the same physical laws that operate on earth also operate in the heavens one universe. Much more: experiments with light, irst relecing telescope, calculus . Newton"s irst law of moion: an object moves at constant velocity unless a net force acts to change its speed or direcion. Newton"s third law: for every force, there is always an equal and opposite reacion force. Objects coninue at constant velocity because of conservaion of momentum.
