ASTR1001 Lecture Notes - Lecture 1: Centrifugal Force, Parsec
Document Summary
Could also use cylindral polar coordinates (shown below) Eqn relating distance to the three coordinates = metric. = if you remove r2 objects will move in circles rather than straight lines. Matter changes in the metric of space around it this causes spacecraft to go in circles (orbit) and objects to fall falls because accelerating downwards is its natural motion in the curved space-time. Force from the table is the only force present being accelerated away from its natural motion by compression of the tabletop beneath it massive things. = table needs force to accelerate them away from their natural no gravitational force heavier motion. Gravity = ficticious force like centrifugal force we feel this when a car goes around a corner but body is just trying to follow natural motion (straight line) & car is pushing sideways. *observed motion of a galaxy is the sum of two components. Motion dues to expansion of space (cid:862)hu(cid:271)(cid:271)le flow(cid:863)
