8th Grade Physics Changing Motion Unit

Force A push or a pull. Image: http://gurtej.net/files/2010/04/man-pushing-a-car.jpg; Definition: www.thefreedictionary.com

Balanced Force 30N 30N The net force on an object is zero and the object’s motion does not change. Image: http://image.wistatutor.com/content/force-laws-motion/balanced-force-example.jpeg; Definition: www.thefreedictionary.com

Unbalanced Force 50N 20N The net force of an object does not equal zero which results in a change in the motion of the object. Image: http://image.wistatutor.com/content/force-laws-motion/unbalanced-force-example.jpeg; Definition: www.thefreedictionary.com

The sum of all the forces acting on an object. Net Force The sum of all the forces acting on an object. Image: http://zonalandeducation.com/mstm/physics/mechanics/forces/netForce/netf3.gif; Definition: www.thefreedictionary.com

Magnitude The strength of an object or event. Image: http://www.supermantv.net/superman/images/wallpaper/super-strength.jpg; Definition: www.thefreedictionary.com

Speed The distance traveled by an object in a given amount of time. Image: http://winstonmotorsports.com/images/bigstockphoto_Speedometer_At___Mph_291241.jpg; Definition: www.thefreedictionary.com

Velocity Speed + Direction

Acceleration You can FEEL acceleration. The rate at which an object’s speed and/or directions changes over time. Images: http://churmura.com/wp-content/uploads/2009/11/200909201630594344711-pf.hmedium.jpg & http://ivsblog.files.wordpress.com/2009/02/dsc00024.jpg; Definition: www.thefreedictionary.com

Friction The force between objects that affects how easily they move past each other. Image: http://www.mikecurtis.org.uk/images/friction.jpg; Definition: Access Science glossary, page 315.

Gravity A force that pulls objects together. Gravity caused the apple to fall on Sir Isaac Newton’s head. Image from: http://4.bp.blogspot.com/_Qe1wgxDiEdU/S0Sufn6jbSI/AAAAAAAAAJo/ak9Ty7SfZr0/s400/newton2.jpeg; Definition adapted from: Access Science glossary, page 316.

Calculate To figure out by computation. Image: http://www.myfhamortgageblog.com/wp-content/uploads/2009/05/calculator.jpg; Definition: www.thefreedictionary.com

Inertia The tendency of an object to resist a change in motion. Image: http://blissfullydomestic.com/wp-content/uploads/inertia-251x300.jpg; Definition: www.thefreedictionary.com

Mass The total amount of matter in something. Image: http://i.ehow.com/images/a05/p6/bc/do-determine-mass-ball-bearing_-200X200.jpg; Definition: Access Science, glossary page 317.

Newton A measurement of force. 15N  Image: http://cache4.asset-cache.net/xc/200132441-001.jpg?v=1&c=IWSAsset&k=2&d=5047FA587DE1CADE1F3073D2496B9401EE66FA52007DD989411803DAC64288B6B5AF9B7D601FECA8; Definition: www.thefreedictionary.com

Newton’s First Law The bowl will stay on the table until an unbalanced force acts on it. An object will stay in motion or an object will stay at rest unless acted upon by an unbalanced force. Image: http://img.alibaba.com/photo/11518097/Coffee_Table_Design_Glass_Table_with_bent_glass.jpg; Definition: www.thefreedictionary.com

Newton’s Second Law The smaller the object, the greater its acceleration, and the more force applied to an object, the greater its acceleration. Image: http://www.physicsclassroom.com/class/newtlaws/u2l3e3.gif; Definition adapted from: ScienceSaurus page 284.

Newton’s Third Law For every action, there is an equal but opposite reaction. Image: http://www.sciencetoymaker.org/balloon/images/newton.gif; Definition: www.thefreedictionary.com

Potential Energy Energy at rest or stored energy. Image adapted from: http://sciencevault.net/11hscphys/84movingabout/pics/elevatedram.jpg; Definition: www.thefreedictionary.com

Kinetic Energy Energy in motion. Image adapted from: http://sciencevault.net/11hscphys/84movingabout/pics/elevatedram.jpg; Definition: www.thefreedictionary.com