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Hey need help fast! (acceleration/grav)

  1. Sep 15, 2008 #1
    How does one answer this question? I reckon its a. But I want to be certain.

    Superman stands atop a very tall mountain and throws a baseball horizontally with a speed such that the baseball goes into a circular orbit around the earth. While the baseball is in orbit, the acceleration of the ball ______.

    a. depends on how fast the ball is thrown.
    b. is slightly less than 9.8 m/s
    c. = to 9.8 m/s
    d. is zero because the ball does not fall into the ground.

    thanks in advance.
  2. jcsd
  3. Sep 16, 2008 #2


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    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi Bjorn-Hadrada! Welcome to PF! :smile:

    Hint: when the ball is in orbit, what forces are acting on it? :wink:
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