February 22, 2017

Homework Help: Physics

Posted by Alphonse on Thursday, November 15, 2012 at 1:57am.

Sadly you have become trapped inside the gravity well of a star of mass M = 6.435×10^30kg. At a distance of r0 = 7.543×10^10m from the center of the star you find yourself moving directly towards it at 5.876×10^4m/s (relative to the star). How fast are you moving relative to the star when you inexorably find yourself a distance of rf=1.460×10^10m from its center? (You have no form of mass/energy that you can throw/eject/propel/fire/burn towards the star to slow or prevent your gravitational free-fall towards the star.)

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