title: Velcro Physics: Collisions should rotate body, but not move it
body: <p>I'm using the latest version of Velcro Physics (formerly Farseer Physics) and I would like to have a body that is able to be rotated by collisions, but not translated/moved by them.</p>
  
  <p>If it helps, the application for this is a gear system where the gears rotate each other but cannot push/move each other.</p>
  
  <p>I've tried setting the position of each gear to the same place every frame, but that solution still allows for the gears to move in that single frame.</p>
  
  <p>Thanks for any help!</p>