Ch4+KloorfainN

=Chapter 4 = toc

11/14 Lesson 1 A-D
What is Newton’s First Law? - law of inertia - lazy law - An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force - - - the object keeps doing what it has been doing as long as it is not being acted up an unbalanced force - a seatbelt is an example of this law - no change in motion unless an unbalanced force acts on the object... otherwise it will move at constant speed in a straight line - object stays in motion with the same speed and in the same direction

What is inertia and mass? - Inertia= the resistance an object has for changing motion  property of that measures how difficult it is to change an objects motion MASS (Kg) <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- weight is a force, pull of gravity on a mass (N) <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">weight= mass X gravity <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">has to reach the same heigh on the other side despite the slope of the other side and the angle size <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">because it never reaches the same height <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- object stop moving in the presence of a force (force of frticition) <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- in the absence of friction the object would continue moving with the same speed and direction <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- resisting motion varies with mass <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- mass is dependent upon inertia <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- more inertia that an object has, the more mass that it has <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- the more massive the object, the more that object resist changes in its state of motion <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- mass tells you how much interia you have <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">-the more mass it has the harder it is to change the motion

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">What are Newton’s Laws of Motion <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- state of motion= velocity= speed with direction <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- the force acting upon velocity is acceleration and if it does not accelerate it stays the same speed <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- inertia= tendency of an object to resist acceleration

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">What are balanced and unbalanced forces? <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">Second law= when an unbalanced force acts on an object, it will accelerate in the direction of the unbalanced force. <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">accelerate in the presence of the greater force <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;"> n>w acelerating up <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;"> velcoity up accelerate up increase speed up <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;"> v down acceleration up decrease speed down <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;"> net force= unbalanced force <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;"> net force= addition of all forces
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">balance each other= equilibrium (if the forces are **equal**)
 * static equilibrium= at rest
 * dynamic equilibrium= constant speed
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">the two forces on weight and normal are balancing each other out but friction has no force to balance it out which makes it unbalanced
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">not at equilibrium and subsequently accelerates
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">if two individual forces are of equal magnitude and opposite direction, then the forces are said to be balanced--> constant speed in the same line
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">An object is said to be //acted upon by an unbalanced force// only when there is an individual force that is not being balanced by a force of equal magnitude and in the opposite direction

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">11/15 Lesson 2 A-D
<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">What is the meaning of force? <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- force= push or pull resulting from object's interaction with another object <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">What are types of forces? <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- contact forces <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- action at a distance <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- weight= force of gravity acting upon an object <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- mass= amount of matter that is contained by the object
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">contact forces
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">result when the two interacting objects are perceived to be physically contacting each other
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">frictional
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">tension
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">normal
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">air resistance
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">applied
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">spring
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">forces resulting from action at a distancevectory quantity= maginute and direction
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">result even when the two interacting objects are not in physical contact with each other, yet are able to exert a push or pull despite their physical separation
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">gravitational
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">electrical
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">magnetic
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">frictional
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">exerted by a surface as an object moves across it or makes an effort to move across it
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">sliding
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">moving/sliding
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">static
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">surfaces of two objects are at rest relative to one another and a force exists on one of the objects to set it into motion relative to the other object
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">often opposes the motion of an object
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">results from the two surfaces being pressed together closely, causing intermolecular attractive forces between molecules of different surfaces
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">tension
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">transmitted through a string, rope, cable or wire when it is pulled tight by forces acting from opposite ends
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">goes in the direction of the tension
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">normal
 * support force exerted upon an object that is in contact with another stable object
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">air resistance
 * special type of frictional force that acts upon objects as they travel through the air
 * often opposes the motion of an object
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">applied
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">applied to an object by a person or another object
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">spring
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif;">exerted by a compressed or stretched spring upon any object that is attached to it
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">gravitationalelectrical
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">which the earth, moon, or other massively large object attracts another object towards itself
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">weight of all objects
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">f= m x g
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">downward
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">magnetic
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">magnetic

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">What are free body diagrams? <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- show the relative magnitude and direction of all forces acting upon an object in a given situation <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- size and direction of the arrow matter

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">What is a net force? <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- unbalanced force refers to that force that does not become completely balanced (or canceled) by the other individual forces <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- vector sum of all the forces that act upon an object <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- force is a vector and two forces of equal magnitude and opposite direction will cancel each other out <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- net force causes acceleration

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">11/17 Lesson 3 A-B
<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">What is Newton’s Second Law?

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- an object will only accelerate if there is a net or unbalanced force acting upon it
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">changing speed
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">direction
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">or both

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- behavior of objects for which all existing forces are not balanced <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- acceleration is dependent upon two variables the net force and inversely upon the mass of the object


 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">force increases acceleration increases
 * <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">mass increases acceleration decreases

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- //net force// equals mass times acceleration; the acceleration in the same direction as the //net force//; an acceleration is produced by a //net force//

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;"> <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">What is the big misconception?

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- f=ma <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- acceleration is in the same direction as the net force <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- //presence// of a force - that force being the force of friction - that brings the book to a rest position <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- the absence of a force of friction, the book would continue in motion with the same speed and direction – forever <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- force is not required to keep any object horizontally moving object in motion

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">12/6 Lesson 3 Vectors A-F
<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">Addition of Forces <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- net force was either vertical or horizontal as well acceleration <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- head to tail theory <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- when it is 0 N it is at equilibrium because the forces are balanced <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- when objects are accelerating they are not balanced therefore the force will not be 0

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">Resolution of Forces <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- single forces can be made into two components: one directed upward and one rightward <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- each component describes the influence it has on the given force <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- horizontal component describes the direction of right or left while the vertical component describes the direction of up or down <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- trigonometry is used to find the componenets

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">Equilbrium and Statistics <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- when all forces are balanced on horizontal and vertical the object is in equilibrium <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- that does not mean the forces are equal <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- net force is zero and so is acceleration <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- an object at equilibrium is either at rest or in motion at a constant speed and direction <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- static equilibrium= when the object is station/at rest

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">Net Force Problems Revisited <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- forces can be broken down into two components <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- these components can replace the applied force to the object at a specific angle

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">Inclined Angles <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- an object placed on a tilted surface will mainly slide down the incline <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- the rate at which it slides down depends on the angle of the surface <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- greater the incline= faster the object goes <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- smaller the incline= slower the object goes <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- object accelerates down because of unbalanced force <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- the force of weight (mass x gravity) acts downward while normal force is perpendicular to the object

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">Two Body Problems <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- involve solving for the acceleration of the objects as well as the force acting between the two objects <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- determine acceleration combined with an individual analysis to find the force between the two objects <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 90%;">- use the two individual objects to develop a system of two equations for solving for the two unknown quantities