Physics+Ch2+Review

=Motion, Forces, and Energy Chapter 2 Vocabulary Flashcards:= http://quizlet.com/7087381/physics-ch2-nature-of-forces-flash-cards/

**Unbalanced forces cause a change in motion**
http://scign.jpl.nasa.gov/learn/plate5.htm http://www.pbs.org/wgbh/buildingbig/lab/forces.html

Forces in nature: http://www.learner.org/interactives/dynamicearth/plate.html

http://player.discoveryeducation.com/index.cfm?guidAssetId=5C04739F-F083-44B6-8351-20BD8A98211A&blnFromSearch=1&productcode=US

NEWTON'S THREE LAWS OF MOTION media type="custom" key="7366855"


 * ==The First Law (or the Law of Inertia ): An object at rest will remain at rest and an object in motion will remain in motion at constant velocity unless acted upon by an unbalanced force.==
 * ==The Second Law (or F=ma ): describes the relationship between force, mass, and acceleration. (A way to remember is F oxborough = Ma ssachusetts)==
 * ==The Third Law (or the A ction-Reaction law) states that forces always occur in pairs. For every action there is an equal and opposite reaction.==

Another Newton Law video:

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**Examples;**

 * ==**Sliding - ice skating**==
 * ==**Rolling - bowling**==
 * ==**Fluid - sky diving**==
 * ==**Static - any time you start an object in motion**==

An example of friction in action (Mythbusters - phone book)

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=**WHAT IS INERTIA?**=

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 * An example of inertia....**

**Gravity depends on the masses of the two objects and the distance between the two objects.**

 * ==**The larger the mass the greater the gravitional pull**==
 * ==**The further apart the objects are the less the gravitional pull**==

**Acceleration due to gravity on Earth is 9.8 m/s/s**
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=What is the difference between weight and mass?=
 * ==Weight is the measure of the pull of gravity on an object.==
 * ==Mass is the measure of the amount of matter in an object.==
 * ==Weight depends on gravity therefore it changes depending on where the object is in the universe.==
 * ==Mass is constant. It NEVER changes. It remains the same no matter where the object is in the universe.==
 * ==Weight is measured with a spring scale in Newtons.==
 * ==Mass is measures on a triple beam balance in grams (or kilograms).==

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