作者chenkaihsu (Shrek)
看板Physics
标题[题目] 普物-质量中心
时间Sun Nov 9 17:53:43 2008
[领域]普物 (题目相关领域)
[来源]课本习题 (课本习题、考古题、参考书...)
[题目]A uniform circular plate of radius 2R has a
circular hole of radius R cut out of
it. The center C' of the smaller circle is 0.8R a distance
from the center C of the
larger circle.
What is the position of the center of mass of the plate? [Hint: Try
subtraction.]
Find Xcm??From the center C of the plate
图课本(Physics for scientists & engineers 4th by GIANCOLI)P244 66题
[瓶颈] (写写自己的想法，方便大家为你解答)
我算出来的答案是0.16R
但MASTERINGPHYSICS这网页跟我说Your answer either contains
an incorrect numerical multiplier or is missing
one.
是我哪里算错了吗??我用力矩算的
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 140.123.222.193
1F：推 i98342108:Hint: Try subraction @@ 11/09 18:24
2F：→ chenkaihsu:我也有用-的质量去算跟力矩一样的答案 11/09 19:41
3F：→ i98342108:那个message好像是说你的式子表达不对不一定是答案错 11/09 21:30
4F：→ i98342108:你要不要看一下说明之类的 输入规则什麽的 11/09 21:30