Acceleration and wheel force safety limits.

加速和车轮力安全限制。

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That work became an important piece of evidence that dark energy — the mysterious force propelling the acceleration of the universe outward — actually exists.

这项工作成了暗能量（这是推动宇宙向外加速的神秘力量）确实存在的一个重要证据。

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In rotation, force becomes torque, mass becomes moment of inertia, and acceleration becomes angular acceleration.

在旋转时，力变成力矩，质量变成转动惯量，加速度变成角加速度。

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Now, gravity, well force, is equal to mass times acceleration, g and the acceleration due to gravity is g.

是重力，等于质量乘以加速度，由重力导致的加速度是。

麻省理工公开课 - 热力学与动力学课程节选

So, a massless body cannot have a net force on it, because the acceleration of the rope cannot be infinite.

所以没有质量的物体不会受到力,因为绳子的加速度不可能是无穷大

耶鲁公开课 - 基础物理课程节选

It says that, "If a body has an acceleration, then you need a force and the relation of the force to acceleration is this thing."

它是这么说的,"如果一个物体有加速度,那么你需要有一个力,力和加速度的关系是这样的"

耶鲁公开课 - 基础物理课程节选

Given the rapid acceleration of technological development, any system that relies on a small, elite force of highly trained government agents may be doomed to failure.

CNN: How technology makes us vulnerable