/sci/ - Science & Math

Do you guys interpret question b as being an elliptical orbit? I was thinking it could be a parabolic orbit just grazing the planet and the speed could simply be found as:

[math] v = \sqrt{\frac{2 \mu}{r}}[/math]

But if it is an elliptical orbit, how in the hell would one go about finding the speed when we have no knowledge about the semi-major axis or the eccentricity of the orbit, which is necessary in the vis viva equation to find the velocity i.e.

[math] v = \sqrt{\mu(\frac{2}{r} - \frac{1}{a})} [/math]

There is no other info on the problem