Educational and visual aid 'Radian'

摘要

The utility model refers to educational and visual aids, in particular, to demonstration tablets that contribute to a more complete and effective understanding and mastering by students of the basic concepts of geometry and mechanics, including such as: the number "π", "radian", the angular velocity ω ", The circumferential speed" V ", the speed of rotation" n "and others, as well as the relationship of these concepts.;The technical result achieved by the useful model is the more complete, effective and thorough understanding and mastering by the students of the basic concepts of geometry and mechanics, such as: the number "π", radians, angular velocity "ω", circumferential speed "V", rotational speed " n ", necessary for studying one of the main types of motion in nature and technology - the rotational motion of a solid body, a visual demonstration of the relationship between the degree and radian measures of angles and the conversion of the degree measure to the radian and back, the activator and cognitive activity of students, increased interest in learning and ensuring its greater availability.;This technical result is achieved by the fact that on the tablet there is graphically depicted a circle divided into different colors of 6.28 sectors corresponding to the number of radians in the circle, with the circumference of the circle divided by 360 °, and in the center of the circle a hub with a movable axis is fixed, which on the side of the image of the circle is fixed a plate (hereinafter - the plate-radius), whose length is equal to the radius of the circle, and on the reverse side of the tablet there is fixed on the axis a handle intended for rotating the plate-radius, Using a measuring ruler whose length is equal to the diameter of the circle depicted on the plate, in addition, on the tablet in text form the definitions of the studied quantities are given and the dependencies connecting these quantities are given.