NATS 1740 Study Guide - Midterm Guide: Conservation Law, Unit, Angular Distance

• School: York University
• Department: Natural Science
• Course: NATS 1740
• Professor: Michael De Robertis, Alireza Rafiee

Document Summary

Chapter 4: making sense of the universe, understanding motion, *notes (1) describing motion (2) mass vs weight. *why are astronauts weightless in space? (3) newton"s law of motion (4) conservation laws (energy, momentum, angular momentum) (5) energy (kinetic, radiative, potential) (6) temperature scales (7) law of gravity (8) orbits and tides: describing motion. Speed: rate at which objects move (s) Acceleration: any change in velocity = speed/time^2 (m/s^2) + galileo: g is the same for all falling subject regardless their mass. + g = 10m/s^2 speed increases 10m/s with each second of falling. Forces causes change in momentum, producing acceleration: mass vs weight. Mass: the amount of matter in an object. Weight: the force that a scale measures. There is gravity in space but constant state of free-fall caused weightlessness. => objects are weightless in free-fall: newton"s law of motion. 1st: an object moves at constant velocity unless a net force acts to change its speed or direction.