notes6a - Newtons Third Law of Motion The first two laws...

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Unformatted text preview: Newtons Third Law of Motion The first two laws deal with a single object and the net forces applied to it- but not what is applying the force(s) The third law deals with how two objects interact with each other Whenever one object exerts a force on a second object, the second object exerts a force of the same magnitude, but opposite direction, on the first object Space station, m s Astronaut, m a s F a F Third law says: force astronaut applies to space station, F s, must be equal, but opposite to force the space station applies to astronaut, F a F F F a s = = s s s s s s s a a a a a a a m F m F a a m F m F m F a a m F / / / / = = = = = = a F FBD a a s a s a a a m m >> << Since The Tension Force Crate, m rope T frictionless Assume rope is massless and taut T -T = = T T F x FBD of rope FBD of crate T m g T m Frictionless pulley Crate at rest mg T mg T F y = = = T m g n...
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This note was uploaded on 12/10/2011 for the course PHY 1111 taught by Professor Stencil during the Fall '11 term at University of Georgia Athens.

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notes6a - Newtons Third Law of Motion The first two laws...

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