In the first chapter of this book, "Vectors and Kinematics - A few mathematical preliminaries", kinematical equations in both polar and cartesian coordinates are introduced (including acceleration in polar coordinates). However, no reference is made to motion with both translation and rotation. In fact, the term reference frame isn't even defined in chapter one (it is first encountered in chapter two). Although there's been absolutely no treatment of rigid body rotations and translations in chapter one, there are a couple of questions at the end of the chapter based on drums rolling without slipping on inclined planes, finding angular acceleration, and so on. Granted, the questions are trivial (to someone who already has some knowledge of rigid body rotation), but my knowledge of rigid body dynamics and simultaneous translation and rotation is very limited at the moment. Should I defer solving those questions until I start the chapters on torque and angular momentum? Why are those questions included in chapter one?