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July 30, 2014

Homework Help: physics: escape velocity

Posted by Laramie on Friday, March 26, 2010 at 9:52am.

You are on Pluto and would like to send a probe into space so that it does not fall back to the surface. What minimum launch speed do you need? (The mass of Pluto is 1.3x^22 kg and the radius of Pluto is 1.18x10^6 m).
Answer in km/s.
I have used the velocity of escape = (square root of) 2(g)(m1)(m2)/r but keep getting the wrong answer.
1.21e5 km/s and 4.7e3 km/s are two of the answers I've been getting. Help?

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