When I hit speed bumps even at 1 mph my rear end makes a rumbling noise like the whole thing is loose or something and I can't figure out what it is.
Wow, I'd pick Burroughs for the biography alone. That guy was a full-fledged iconoclast. Working through the literary elements will be the more difficult part of the project from my perspective but the biographical information will be interesting. If you have to give a presentation, your recounting of his life's events will be what the other students remember.
If you don't hear any grinding sounds, it's probably just dirty. Trying getting a canned of compressed air (Meijer, WalMart, etc. will have it) and blowing out the accessible areas. You might also want to take rubbing alcohol and clean the rollers with a non-lint piece of cloth (lens cloth would work) or cotton swabs (carefully to avoid getting the fibers on the rubber rollers)