线轴状刚体平面平行运动实验简析
发布时间：2018-12-17 08:03
【摘要】：用细丝线拉动线轴状刚体在水平平面桌面上(或水平导轨上)的运动,是典型的平面平行运动.改变细丝线拉力的倾角或方式,线轴状刚体可以有多种不同的运动状态,因此这是一个有趣的演示实验.之所以线轴状刚体有多种运动状态,关键因素是线轴状刚体在作纯滚动时它与平面桌面或导轨之间的相互作用力是静摩擦力,静摩擦力可以在一定范围连续变化以使线轴状刚体的运动能够满足动力学方程和运动学方程.当所需要的静摩擦力超出其最大允许值时,线轴状刚体与平面桌面或导轨之间将出现滑动,二者之间的摩擦力将由静摩擦力变为滑动摩擦力,纯滚动状态将消失.
[Abstract]:The motion of the linear axis rigid body on the horizontal plane table (or on the horizontal guide rail) is a typical parallel motion of the plane. It is an interesting demonstration experiment to change the inclination or the way of the wire pull force, the linear axis rigid body can have many different motion states, so this is an interesting demonstration experiment. The key factor is the static friction between the linear axis rigid body and the plane table or the guide rail when the linear axis rigid body is in pure rolling, and the main reason is that the linear axis rigid body has a variety of motion states. The static friction force can change continuously in a certain range so that the motion of the linear axis rigid body can satisfy the dynamic equation and kinematics equation. When the required static friction force exceeds its maximum allowable value, there will be sliding between the linear axis rigid body and the plane table or guide rail, the friction between them will change from static friction to sliding friction, and the pure rolling state will disappear.
【作者单位】： 清华大学物理系;
【分类号】：O313.3
本文编号：2383930
[Abstract]:The motion of the linear axis rigid body on the horizontal plane table (or on the horizontal guide rail) is a typical parallel motion of the plane. It is an interesting demonstration experiment to change the inclination or the way of the wire pull force, the linear axis rigid body can have many different motion states, so this is an interesting demonstration experiment. The key factor is the static friction between the linear axis rigid body and the plane table or the guide rail when the linear axis rigid body is in pure rolling, and the main reason is that the linear axis rigid body has a variety of motion states. The static friction force can change continuously in a certain range so that the motion of the linear axis rigid body can satisfy the dynamic equation and kinematics equation. When the required static friction force exceeds its maximum allowable value, there will be sliding between the linear axis rigid body and the plane table or guide rail, the friction between them will change from static friction to sliding friction, and the pure rolling state will disappear.
【作者单位】： 清华大学物理系;
【分类号】：O313.3
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