If there were no force at the pin, g this object would be accelerated down with acceleration g, and that's not what's going to happen.

如果没有力的话，这个物体就会以加速度,往下掉，但是这,并没有发生。

youdao

I call this the plus direction, so for object number two m2a I have m2 g minus T equals m2 times a.

对于物体二，以向下为正方向,有m2g-T等于。

youdao

SimpleXML's children() method is used in conjunction with the g: namespace to return this node collection as a SimpleXMLElement object named $attrs.

SimpleXML 的 children() 方法与 g: 名称空间一起用于，将该节点集合作为一个名为 $attrs 的 SimpleXMLElement 对象返回。

youdao

Let us say P for plane, G for ground, O for object.

我们定义 P 是平面,G 是地面,O 是物体

耶鲁公开课 - 基础物理课程节选

For example, we know that if a body is near the surface of the Earth, the force of gravity of that object seems to be m times g, where g is 9.8.

例如,我们知道,如果在地球表面有一个物体,该物体受到的重力大小为 m 与 g 的乘积,g 等于 9.8

耶鲁公开课 - 基础物理课程节选