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物体在力的作用下形状或体积会发生改变,这种变化叫做形变.有时物体的形变很小,不易观察到.而让学生“观察”到这种微小形变的发生,对形成弹力的概念起着至关重要的作用.经过大量实践,笔者利用移液管(2 mL,化学实验室一般都有)自制了微小形变演示器,效果非常显著.
Objects under the action of force will change in shape or volume, this change is called deformation. Sometimes the deformation of the object is small, not easy to observe. And let students “observation ” to the occurrence of such small deformation, the formation of elastic Concept plays a vital role.After a lot of practice, the author of the use of pipette (2 mL, chemical laboratories generally have) made a small deformation of the demonstrator, the effect is very significant.