PROBLEM TO BE SOLVED: To provide a lever experiment tool capable of further improving learning effect relative to prior ones.;SOLUTION: A lever experiment tool comprises: a base 20; a pillar 30 erected on the base; an arm 40 rotatably attached in the vicinity of an upper end of the pillar; a fulcrum hole 60 which is bored at a center in a longitudinal direction of the arm; a fulcrum shaft 50 composed of a shaft part 50B which is formed so as to protrude in a direction orthogonal to the longitudinal direction of the pillar and has an outer diameter shorter than an inner diameter of the fulcrum hole of the arm and thereby be inserted in the fulcrum hole of the arm, and a shaft head part 50C having an outer diameter longer than the inner diameter of the fulcrum hole of the arm; a plurality of weights 70 to be hooked on the arm; and arm fixing means 100 to 130 provided in the vicinity of the fulcrum shaft of the pillar.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT
展开▼
