Appropriate coordinate system if the free body

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Unformatted text preview: the forces ac2ng on an object •  are ac2ng on the object •  are ac2ng on other objects Applica2ons of Newton’s Laws •  Assump2ons –  Objects behave as par2cles •  Can ignore rota2onal mo2on (for now) –  Masses of strings or ropes are negligible –  Interested only in the forces ac2ng on the object •  Can neglect reac2on forces More Assump2ons – Ropes •  Ignore any fric2onal effects of the rope •  Ignore the mass of the rope •  The magnitude of the force exerted along the rope is called the tension •  The tension is the same at all points in the rope Free Body Diagram •  A diagram of the forces ac2ng on an object •  Must iden2fy all the forces ac2ng on the object of interest •  Choose an appropriate coordinate system •  If the free body diagram is incorrect, the solu2on will likely be incorrect Free Body Diagram, Example •  The magnitude of force T is the tension ac2ng on the box –  The tension is the same at all points along the rope • ...
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This document was uploaded on 01/14/2014.

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