Lesson+5+&+6

**﻿Advancememt in Physics @ Dwight Englewood** **Director: Elise Burns** **TA: Sebastian Loh**

Joke: There ha been too much ation and reaction to political scandals. Please right to your congressmanand ask him to repeal Newton's Third Law.


 * 1) Newton’s First Law of Motion
 * 2) Newton’s laws say that an object in motion or at rest will stay in that state unless acted on by an outside force.
 * 3) Objects in motion will maintain the same speed and the same direction
 * 4) This is known as //Inertia//
 * 5) Inertia & Mass
 * 6) Galileo said that objects in motion will continue to move unless slowed by //friction.//
 * 7) Experiment //Dynamic//

All objects resist changing their states. Some more than others.

ie: “The more inertia that an object has, the more mass that it has. A more massive object has a greater tendency to resist changes in its state of motion.”


 * 1) State of Motion
 * 2) //Inertia //can also be defined as the tendency an object has to resist change in its velocity and acceleration.
 * 3) The Meaning of Force
 * 4) <span style="font-family: 'Times New Roman','serif'; font-size: 16px; line-height: 115%;">Force is the push or pull on an object from contact with another object.
 * 5) <span style="font-family: 'Times New Roman','serif'; font-size: 16px; line-height: 115%;">There are two types of forces, forces from contact and from a distance
 * 6) <span style="font-family: 'Times New Roman','serif'; font-size: 16px; line-height: 115%;">Contact: when two or more objects are touching each other, examples are frictional forces, tensional forces, normal forces, air resistance forces, and applied forces.
 * 7) <span style="font-family: 'Times New Roman','serif'; font-size: 16px; line-height: 115%;">At a distance: when the objects are able to result in a push or pull force but are not in physical contact. For example, gravitational forces, magnetic forces and electrical forces.
 * 8) <span style="font-family: 'Times New Roman','serif'; font-size: 16px; line-height: 115%;">Force is measured in Newtons, has a direction and is a vector quantity.


 * 1) <span style="font-family: 'Times New Roman','serif'; font-size: 16px; line-height: 115%;">Drawing Free body Diagrams: these diagrams are used to show the direction and “relative magnitude” (size) of all the forces.