如題
newton's1:慣性系下F和a成正比，因此沒F的時候沒a，所以v的大小和方向不會改變
newton's2:F和m成正比，把1和2合併，F=ma
接著我就想，為何不合併這2個定律，直接寫作F=ma。
Why?
What?
newton的1,2定律為何要分成2條定律
2014-07-27 1:24 am
回答 (1)
2014-07-27 4:23 am
✔ 最佳答案
newton first law : an object remains in uniform motion unless an unbalanced force is added on it,not the one you mentioned:)
also, second law appear after 1st law
so you cant use 2nd law to explain 1st law
then, each law has its specific function and u cant simply combine them
i hope my explaination is of some help to u!
收錄日期: 2021-04-15 16:02:40
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140726000051KK00094