Homework Help: earth

Posted by Sarah on Friday, July 13, 2012 at 1:02pm.

You are standing on a planet with a radius 10,000kilometers. It's mass is 10^26 kg. What is the planet's escape velocity from where your standing? Ignore rotation of the planet.

earth - drwls, Friday, July 13, 2012 at 2:53pm
(1/2) m Vescape^2 = G m M/R
The term on the right is the potential energy change necessary to escape.
m is the object's mass (which cancels out)
M is the planet's mass
G is the universal gravity constant

Vescape = sqrt(2G*M/R)

Do the numbers

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