Carrier,
ClarisWorks 5.0 became AppleWorks which was later succeeded by iWork. iWork will open all AppleWorks documents except databases. Appleworks should work on your new iMac. The only problem is that it has been discontinued. Your first port of call should be to try and open the documents in iWork.
Apple - Support - AppleWorks - FAQ
Are you able to get the files off the floppy and onto your iMac's hard drive? Instead of double-clicking the file, which will make the computer try to open your copy of ClarisWorks, try opening the ClarisWorks file from within iWork.
Failing that, the last version of AppleWorks should do the trick, which can then save the files as iWork files or .doc for use in Microsoft Word.
AppleMacster