The scanner uses a high-speed camera placed over the conveyer belt that moves the produce along.

VOA: special.2011.06.07

So, you picked up some speed, then you're coasting along at a steady speed.

所以当你加到一定速度,然后你便匀速上升的时候

耶鲁公开课 - 基础物理课程节选

I'm asking what's the tangential speed as it moves along the circle?

它在做圆周运动时,切向速度是多少

耶鲁公开课 - 基础物理课程节选