8th Grade Physics Changing Motion Unit

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Presentation transcript:

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

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

Net Force The sum of all the forces acting on an object. (same direction=add, opposite directions= subtract) Image: http://zonalandeducation.com/mstm/physics/mechanics/forces/netForce/netf3.gif; Definition: www.thefreedictionary.com

What is Motion? Motion: A change in position of an object compared to a reference point Motion involves all of the following:

Forces affect Motion: They can make objects start moving. They can make objects move faster. They can make objects move slower. They can make objects stop moving. They can make objects change direction. They can make objects change shape.

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

Velocity Speed + Direction

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.

What is Friction? What are some ways athletes uses friction?

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

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