This question has been buggin' me for ever and eternity... So staticians state that toast will always land butter side down and that cats will always land on their feet. So what would happen if you tied buttered toast to a cats back and dropped it upside down from a hieght?
(I assume this is only half serious, but I'll answer it seriously anyway.)
The cat would land on its feet.
There is no statement that toast will land butter side down. It's simply what tends to happen when dropped from the height of the average kitchen worksurface. It rotates because one side is heavier (with the stuff on it), so it's more likely to fall that way.
Toast is usually dropped by it being knocked off a table or a plate someone is carrying.
As the toast goes over edge first it's put into a slow spin.
Unfortunately the fall is never high enough for the toast to do a full 360 so only ever spins enough to land butter side down.
Cats land on their feet coz their clever like that.
I think the strength and mass of the cat would easily overcome that of a slice of toast.
So a dropped cat with a slice of toast on it's back would always land feet first. Probably with its claws out and gunning for the guy who stuck buttered toast to it.
This question has become seriously garbled since it was first posed in the 1940s. The theory of resistentialism as invented by Jean-Marie Ventre states that toast is likely to fall marmalade side down, and that the more expensive/ difficult to clean the carpet, the more likely this is.
Bringing cats and butter into it is a travesty. All the experiments were done with marmalade.
If you super glue a line of lead weights to the back of the cat and then hurl it from window, toast or no toast, marmalade or butter, its going to land on its back.