In another event, the cowboy throws a rope around the neck of a young cow.

VOA: special.2009.02.16

In all these examples, this rope is assumed to be massless.

在所有这样的题目里都假设绳子没有质量

耶鲁公开课 - 基础物理课程节选

Sandy Potter was jumping rope with children in her neighborhood when the bone in her thigh snapped.

VOA: standard.2010.03.14