Newton’s Third Law of Motion

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Presentation transcript:

Newton’s Third Law of Motion Chapter 6 Newton’s Third Law of Motion

Force Force is a push or pull Force is part of an interaction (A pair of forces)

Newton’s Third Law “When an object exerts a force on a second object (action force), the second object exerts an equal and opposite force (reaction force)”

Newton’s Third Law

More Action-Reaction pairs Planets – Stars http://planetquest.jpl.nasa.gov/science/finding_planets.cfm Vehicles falling in the water Tug-of-war

Doesn’t the action /reaction cancel out? Equal & Opposite right? Pg ?? Nope. No good. Action/Reaction act on different Objects!

Newton’s Third Law on Different Masses (cannon) Ma = f = mA (cannonball) http://www.shoutwire.com/articles/98530/Soldier_owned_by_Artillery_Cannon.html

When is Newton’s 3rd Law true? ALWAYS!!!!!