NATS 1740 Lecture Notes - Lecture 10: Net Force, Tsiolkovsky Rocket Equation, Weightlessness

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

Document Summary

Velocity (v): speed and direction e. g: 10m/s due east or going around in the circle. Acceleration: any change in velocity (speed/time square) (m/s2). Here a ball bounces off the building. It starts at 0 speed, 1s the ball falls 10m/s, after 2s is. 20m/s because the acceleration of any objects falling is 10m/s2 = g (earth"s acceleration)=> then we can calculate how high the building is. => speed increases 10m/s with each second of falling. Galileo did an experiment and g is the same for all falling objects regardless their mass. A net force is the sum of all forces acting on an object (two people pull a rope). Mass: the amount of matter in an object (all number of proton, neutron, electron) Weight: the force that a scale measures (kilograms, the measure of gravity of an object) => you will have the same mass on moon but different weight because the gravity is different.