Hi,
Three methods to try (in this case from an Apple user's guide for the Performa 500 series):
- Hold down the Command and Shift keys and press the number 1 key on your
keyboard to eject a disk in the internal disk drive.
- Turn off the computer. If the disk isn’t ejected, then hold down the button
on your mouse or other pointing device while you turn the computer on
again.
- Locate the small hole near the disk drive’s opening, and carefully insert the
end of a large straightened paper clip into it. Push gently until the disk is
ejected. Do not use excessive force.
Remember to turn the computer off before using the paper clip method. You may have to push just a bit further (still without excessive force). The problem as such could be related to bad internal floppy drive lubrication. I have also noticed that some floppy makes/types may eject more easily than others.