This question is about this video on YouTube, in which a bullet is fired vertically into the center of a wooden block from below, sending the block up into the air. Next, a bullet is fired vertically but off-center into a similar block from below, again causing the block to rise into the air, but simultaneously to rotate. The video asks for a prediction as to which block will rise higher. Please also post your initial guess along with answer. My first guess was that air friction decreases when object is rotating, but now I think that's not true (is it?). Someone please shed some light on this. Is it possible that the first bullet went deeper inside the first block and thus the first block had lesser kinetic energy than expected?