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Homework Help: Calculate Gravitational Field Strength

  1. Nov 25, 2012 #1
    1. The problem statement, all variables and given/known data
    Given Radius is 4.76*10^5 m
    Astronaut drops a hammer of 0.85kg from a height of 1.25m. It takes 3s to reach the ground
    What is the gravitational field strength?

    2. Relevant equations

    3. The attempt at a solution


    But that's not the answer
  2. jcsd
  3. Nov 26, 2012 #2


    User Avatar
    Homework Helper

    That 1.25/3 is the average velocity.

    Our formulas make use of a specific velocity, usually initial or final depending on which formula you wish to use.
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