I've got a question in front of me that asks to find the escape velocity for a hypothetical celestial object that has the same density as the sun.(adsbygoogle = window.adsbygoogle || []).push({});

MC answers are -

1)2.51 x 10^3 m/s

2)6.18 x 10^5 m/s

3)3.08 x 10^5 m/s

4)5.42 x 10^10 m/s

As far as I can work out its not possible to find an escape velocity while only knowing the density. I can work out that

v = 8.873 x 10^-4 x r

but not find actual v without knowing the radius.

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# Homework Help: Impossible escape velocity question

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