Physics

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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.)

  • Physics -

    Sorry about not replying last time! I figured this one out though.

    The solution can be found by:
    vf=√[(v0^2)+(2GM/rf)-(2GM/r0)]

  • Physics -

    Thanks! Got it.

  • Physics -

    Did you get #1 and #3?

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