Development of frictionless equipments for teaching mechanics using fine plastic beads

人们普遍认为物理是一门很难的学科，尤其是力学。其主要原因是由于摩擦的干扰，力学定律不容易证明。利用直径约0.3 mm的微细塑料微珠，成功地制造了机械用无摩擦设备。我们已经证明，这种方法几乎可以应用于物理教科书中描述的任何项目，包括波动力学。我们也通过在日本和国外学校的许多活动证实了这种设备和方法的有效性。

It is widely believed that physics is difficult subject, especially on mechanics. The main reason is that mechanics laws cannot be easily demonstrated due to the disturbance of friction. We have succeeded in constructing frictionless equipments for mechanics by utilizing fine plastic beads (diameter of about O.3mm). We have proved this method can be applied to almost any items described in physics textbooks, including wave mechanics. We also confirmed the effectiveness of this equipment and method through many activities in schools in Japan and abroad.