sliding frictional force

例句：

1. 1. The car's tires are designed to provide maximum traction on slippery roads.
   汽车轮胎设计用来在滑滑的路面上提供最大的牵引力。
2. 2. The sliding frictional force between the two surfaces is what causes the wheel to spin.
   两个表面之间的滑动摩擦力是导致车轮旋转的原因。
3. 3. In aerodynamics, the drag force is often described as the product of the velocity and thesquare of the radius of the object.
   在空气动力学中，阻力通常被描述为速度和物体半径平方的乘积。