I was completing a chapter on momentum in my physics textbook. I took the test, in which I encountered the following question: Would a cat without a tail be able to right itself while falling so that it always landed on its feet? Earlier in the chapter the author explained that cats were able to land on their feet almost all the time due to the fact that they had tails. While falling upside down, the cat would spin its tail in direction opposite to the direction it wanted to spin. Due to the law of momentum conservation (its application is approximated here), the cat's body will begin to spin the other way. Given enough time, the cat will be right side up for landing. My answer to the question was that the cat would still be able to land upright, provided that it was able to spin or turn another one of its appendages, such as a leg. My (rather drawn out) rationale is that the cat only spins less than 180 degrees in order to land upright. I assume cats can move their legs almost 180 degrees about their body, so it should be possible for the cat to land upright. However, the textbook states that a cat with no tail will not be able to right itself. Is there any logical or scientific explanation, or is it a perhaps badly put , ambiguous question?