英语翻译two crates are stacked on top of each other on a horizon

来源：学生作业帮编辑：神马作文网作业帮分类：英语作业时间：2024/11/10 17:54:37

英语翻译
two crates are stacked on top of each other on a horizontal floor;crate 1 is on the bottom,crate 2 is on the top.compared with the strength of the force F1 necessary to push only crate 1 at a constant speed across the floor,the strength of force F2 necessary to push the stack at the same constant speed across the floor is greater than F1.
这里《push only crate 1》的时候有没有crate2放在crate1上面?
很奇怪..

两个箱子相互叠放在不光滑的水平面上,其中箱子1在下,箱子2在上.
假设单独推动箱子1、使其在水平面上以恒定速度运动所需的力是F1,推动叠放在一起的两个箱子、使其在水平面上以恒定速度运动所需的力是F2,那么F2大于F1.
push only crate 1的时候当然没有crate 2.

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