Low frictional force high school physics mechanical experiment air track

The utility model discloses a low frictional force high school physics mechanical experiment air track, including guide rail body, glider, gas -supply pipe, alternate between the installation piece that corresponds and be provided with the support trachea, the gas -supply pipe has a supplementary trachea at the one end intercommunication that is close to the guide rail body, the articulated one end that goes up branch in upper end of mounting panel, the articulated one end of branch down of lower extreme of mounting panel, and the other end of branch hinges at the middle part of last branch down, the other end of going up branch is connected with mounting sleeve, the bottom of screw pole and the last end face contaction of guide bar, set up the slider on the lateral wall of guide bar, the slide is seted up to mounting sleeve's inner chamber wall lower extreme, and the slider pegs graft in the slide, the arc joint is on supporting the trachea, the lower extreme both sides symmetric connection of arc has the ch