The time derivative of acceleration is called jerk, and the time derivative of jerk is called jounce. One published paper 1 whimsically named the fourth, fifth, and sixth derivatives of \(x\...The time derivative of acceleration is called jerk, and the time derivative of jerk is called jounce. One published paper 1 whimsically named the fourth, fifth, and sixth derivatives of x "snap", "crackle", and "pop" after the cartoon characters on boxes of Rice Krispies ® breakfast cereal. We will seldom, if ever, have need of these higher-order derivatives of x for this course, but for reference, they are summarized in Table \PageIndex1.