EDUCATIONAL AND RECREATIONAL DEVICE

摘要

The invention relates to devices which can be used both as a visual aid in teaching the peculiarities of the movement of bodies under the action of external forces, and as a game. The device comprises a ball and a panel with periodic corrugations. The amplitude of the corrugations is at least 10 times smaller than the period of the corrugations, and the ball has a diameter which is at least 10 times smaller than the period of the corrugations. The corrugations in the surface of the panel can be sinusoidal, trapezoidal, triangular or another more complex shape. The device can be equipped with a means which makes it possible to throw in the ball at different angles with respect to the plane of the panel and at different initial speeds.