The effective friction coefficient is applied to the study of the oblique impact of a rigid sphere against a ductile solid.
此有效摩擦系数被应用于研究刚性球自由斜冲击延性靶问题。
The perturbation method is used to analyse the motion of the rigid sphere under the action of the nonlinear sliding friction.
用摄动法分析刚球在非线性滑动摩擦力作用下的运动规律。
Experiment with a helium balloon, a hot air balloon, or a rigid sphere filled with different gases. Discover what makes some balloons float and others sink.
进行实验的是氦气球——热气球，或者一个充了不同气体的刚性球体。探究是什么让气球飘起来，而让其他物体沉下去。
Instead of having the sphere within a bowl he created metal housing which kept the sphere rigid.
而不必在一个碗里球，他创造的金属外壳从而保持刚性球体。
Chaplygin's sphere on a rough plane and a rigid body in viscous medium or with a cavity filled with viscous fluid are discussed as examples.
列举粗糙平面上的球，粘性介质中的刚体以及带充粘性流体腔的刚体为例。
No-spherical rigid body that has anisotropic inertia is called no-spherical sphere of inertia.
具有“各向同性”的转动惯量的非球形刚体称为非球形惯量球。
The exact solution of torsion of rigid half sphere embedded in an elastic half space is also presented.
文中也给出了刚性半球嵌在弹性半空间的扭转的精确解。
The exact solution of torsion of rigid half sphere embedded in an elastic half space is also presented.
文中也给出了刚性半球嵌在弹性半空间的扭转的精确解。
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