Angular momentum without rotational kinetic energy? Consider a particle (a ball or electron or whatever you like) that moves in a perfect circle with constant angular and tangential velocity about a fixed point in space. This particle does not spin about itself. The movement is perfectly translational. (OR could we say its movement is rotational?) Obviously, this particle has angular momentum about this fixed point. Also, this particle has translational kinetic energy. However, could we say that this particle has rotational kinetic energy?