title: From pymunk to real-world units
body: <p>I have two questions.</p>
  <ol>
  <li>How to convert pymunk rotation into real-world radians/sec.</li>
  <li>How to determine the x and y velocities of the falling masses in terms of pixels moved/sec</li>
  </ol>
  <p>Does it have anything to do with space.step() or frames per second?</p>