To facilitate students to better understand the relationship between the three accelerations, forces and the quality of movingobjects in Newton＇s second law, a new fast demonstration instrument of Newton＇s second law has been developed in this paper. Thedemonstration instrument according to zero initial velocity acceleration between the acceleration and displacement of the same time inlinear motion is proportional to the size of the displacement acceleration to said, then the three track parallel to each other, by controllingthe variables of ...
