Physics Help Forum elliplical path

 Periodic and Circular Motion Periodic and Circular Motion Physics Help Forum

 Jan 18th 2015, 07:27 AM #1 Junior Member   Join Date: Jan 2015 Posts: 15 elliplical path Suppose, an object is travelling through a circle path. For which conditions this path will be elliptical or circular?
 Jan 18th 2015, 03:40 PM #2 Forum Admin     Join Date: Apr 2008 Location: On the dance floor, baby! Posts: 2,664 It is difficult to answer you without more information. If an object is subjected to a particular kind of central force the equation of motion will predict a stable orbit of some kind. In particular if the central force is a 1/r^2 force (as is gravity) then corresponding stable orbit will be elliptical. (A circle is a kind of ellipse so circular orbits fall into this category as well.) That's all I can do without more specifics about the question. -Dan __________________ Do not meddle in the affairs of dragons for you are crunchy and taste good with ketchup. See the forum rules here.
 Jan 18th 2015, 03:54 PM #3 Senior Member     Join Date: Apr 2008 Location: Bedford, England Posts: 668 As Topsquark says, circular is a special case of elliptical, All orbits will be elliptical, They will only be circular if extra care is taken to set them up perfectly, and then they will need constant attention to keep them circular as there will be little gravitational nudges and pulls all the time from the moon, planets, the sun, etc. __________________ You have GOT to Laugh !

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