作者zhanguihan (han)
看板Physics
标题Re: [问题] 物体m由斜面M上滑落，求其互相的作用力？
时间Fri Oct 19 21:59:09 2018
※ 引述《ds1598753 (肉肉)》之铭言：
: 题目：
: 在光滑水平面上有一质量为M的光滑斜面，其斜面上放一个质量m的小木块(可视为质点)，斜面的倾斜角度为[细塔]，当m从高为h处由静止开始下滑时，在下滑过程中求木块与斜面之间的相互作用力为何？
: 想法：
: 曾有想过是不是用能量观点解，还有用内动能方式解，但好像都不对劲，想问大家有没有什麽其他的想法呢？
It is noted that the interacting force is perpendicular to the bevel.
In the fixed frame, the bevel will be accelerated by the interacting force
and the acceleration can be expressed in terms of the interacting force and
the mass of the bevel.
Now considering a new frame in which the bevel is in rest. Since this new
frame is not an inertial frame, it will produce a pseudo-force acting on
the point mass.
In this new frame, the point mass will move along the bavel. Therefore the
net perpendicular force should be zero. This relation is what you desire.
--
※ 发信站: 批踢踢实业坊(ptt.cc), 来自: 180.177.159.78
※ 文章网址: https://webptt.com/cn.aspx?n=bbs/Physics/M.1539957552.A.B73.html
1F：推 Vulpix: 分析所有受力和加速度也是足够的。 10/20 03:29