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Homework Help: Escape Velocity.

  1. Jan 11, 2010 #1
    A certain planet with a radius of 8.30×107 m has an escape velocity of 3.60×104 m/s. What is the mass of this planet?

    How do i solve this?
  2. jcsd
  3. Jan 11, 2010 #2


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    Homework Helper

    What is the gravitational potential needed to carry a mass m to infinity?
  4. Jan 11, 2010 #3
    escape velocity = sqrt(2*G*M/r)
  5. Jan 11, 2010 #4
    Throwing out a single line of text with no justification doesn't help the OP at all. We're here to help him understand not simply toss a formula his way and tell him to plug in the numbers... What use is that?
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