friction force

基本解释

What effect does this have no the friction force between the opposing lineman 's feet and ground?
这对这名边线防守队员的脚与地面之间的摩擦力产生了怎样的影响?。
The coefficient of friction-----This factor relates the amount of friction force between two surfaces to the force holding the two surfaces together.
摩擦系数----这个系数是与相对摩擦的两个表面摩擦力有关的一个系数。
Popularization and application of ion nitrided titanium parts have shown that they are suitable for long-term use in harsh environment under kinetic load, friction force and corrosive media.
耐磨性能和在还原性介质中的耐蚀性能，可使钛材在高度动负荷、摩擦力和强腐蚀介质三者同时存在的苛刻环境中长期使用。

That means the force you're applying is cancelled by another force, which has got to be the force of friction.
意味着你施加在物体上的力被另一个力抵消了,这个力就是摩擦力
耶鲁公开课 - 基础物理课程节选
So force of friction is yet another force.
摩擦力就是另外一种力
耶鲁公开课 - 基础物理课程节选

They worry about the growing power of the Sunni sheikhs within the police force, that could lead to more friction with the Shiite-dominated government in Baghdad.
NPR: Sunni Sheiks Join Iraqi Police to Fight Al Qaida
He had complained frequently that the Air Force was not getting ground forces the reconnaissance support they needed in overseas conflicts, and there was continuous friction over modernization priorities (Gates eventually terminated a fighter program championed by the purged Air Force leaders).
FORBES: Air Force Positions For Resurgence In Pacific Era

摩擦力
From the analysis results, we learned that the main influence factor is friction force.
从分析结果得知影响伺服系统低速性能的主要因素是摩擦力。
计算机科学技术
拉坯阻力