rotating radi

Well, last week I talked about some examples of centripetal force. This week I got some more, but they show some stuff that has to do with radi. The first was that rotating plate in the microwave, since I made popcorn today (Doc's favorite food?). If I put the popcorn in the middle of the plate, it doesn't move that much. But if I put it on the edge, it spins 'round and 'round. Another thing like that is the "lazy susan" in my house, which is like a circular, rotating, cuboard. If I put something in the middle of the susan, I'll always have to reach into the middle to grab it, as opposed to putting it on the outside and rotating it in front of me. What does this have to do with Physics? Good question, and the answer is everything. But I was just thinking aobut how the radi affects everything in rotational motion. If the radi is huge, compared to small, the item will have to move much faster to make the same angular displacement. This alos reminds me of my second physics post about marching in the parade. The week before the parade we marched outside and practiced going around turns. The thing was that if we wanted to keep a straight line, the people on the outside had to quicken step, and the people inside had to slow down. It's all about the radi to the center of rotation. Go Steelers! Also, that picture of the lazy susan needs to be rotated...it's sideways