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Why are most planetary orbits nearly circular?

Between the orbits of Mars and Jupiter, several thousand asteroids move in nearly circular orbits...?

  • around the Sun. Consider an asteroid that is spherically shaped with radius r and density 2100kg/m^3. You find yourself on the surface of this asteroid and throw a baseball at a speed of 25m/s. If the baseball is to travel around the asteroid in a circular orbit, what is the LARGEST radius asteroid on which you are capable of accomplishing this feat? After you throw the baseball, you turn around and face the opposite direction and catch the baseball. How much time T elapses between your throw and your catch?

  • Answer:

    How in the hell are we going to get on the surface of an asteroid?

Jack P at Yahoo! Answers Visit the source

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