Please finish the blank problems which show on this webpage.
http://le9ncg.bay.livefilestore.com/y1ppilkGsM58S0USTZCeeg-RKQtPa3mokMdfd_vTA6jMjrb2fIZci1yKNvrNFkEtbEGmXcfd1j-2WEDjFiNdXLBG68HtW8jFoOc/%E6%8E%83%E6%8F%8F0008.jpg
About force
2009-05-20 9:18 pm
回答 (1)
2009-05-21 2:03 am
✔ 最佳答案
The centre of gravity of a body is a point which seems that the gravitational force seems to act through.Its centre of gravity would be its geometric centre.
Take moment about the hinge for the door
F(0.60) >= 50(0.30)
F >= 25 N
The min force is 25 N
It is to increase the force to move the door for safety reason.
參考: Physics king
收錄日期: 2021-04-19 14:26:34
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090520000051KK00590