人体的骨胳和肌肉可以组成各种不同的杠杆以便利人体的运动。骨胳可以起到杠杆臂的作用,骨头之间的关节通常是杠杆围绕其转动的支点,而肌肉则可提供使杠杆转动的作用力。我们制作了四种不同类型的人体杠杆模型以供专攻理科的学生在不需用微积分所进行的实验中使用。这些模型用有趣的方法向学生们介绍了力矩的概念和有转动轴物体平衡的条件。在实验中,学生们在杠杆上增加负荷△W(例如在 The body’s bones and muscles can be composed of a variety of different levers to facilitate the body’s movement. The bone can act as a lever arm. The joint between the bones is usually the pivot point around which the lever rotates, and the muscle can provide the force to rotate the lever. We have produced four different types of human leverage models for students who specialize in science to use in experiments that do not require calculus. These models introduce students to the concepts of torque and conditions for balancing objects with rotating axes in an interesting way. In the experiment, students increase the load △W on the lever (for example,