In this thesis physical qualities of the four sports being part of Racketlon, namely table tennis, badminton, squash and tennis, are investigated. First of all, a brief overview in regard to the history and the rules of Racketlon as well as the individual disciplines will be given. Furthermore, the theoretical part of this work mainly focuses on calculations in respect to the coefficient of elasticity as well as to the trajectory of the ball, taking into account aerodynamic resistance and spin. The main part, however, will be constituted by experimental investigations of various parameters of the single balls. Slow motion picture was used to record characteristic movement patterns such as, for instance, reflectance of the balls at the ground or rotation of the badminton ball. In addition, these patterns were analysed with specific programmes. Moreover, a discussion of the individual data as well as a comparison, where possible, will be provided: The coefficient of elasticity is the highest for table tennis. In squash this coefficient strongly depends on the warmth of the ball; as far as table tennis and tennis are concerned a linear dependence on the interfering pressure can be observed; in squash this dependence is almost exponential. Furthermore, this data was used to calculate the period of oscillation of the tennis and table tennis ball. In badminton different values in regard to the rotation of the ball (range, angular speed) were measured. All experiments are designed in a way which would allow for a reuse in upper grade physics lessons. They may be used in order to provide students with a motivating enhancement of the regular mechanic related topics.