"Free fall"點解？
一個物體free fall時，reaction force等於幾多？net force有幾多？weight同mass有幾多？等等ga問題。
係Physics入面，"free fall"係咩意思？
2008-02-17 4:58 pm
回答 (1)
2008-02-18 7:37 am
✔ 最佳答案
reaction force is a force applied to the object by the ground ...therefore the reaction force equal to zero when free fallnet force equal to weight because weight is the only force act on the object when free fall
free fall means the object accerate due to the gravity .
Weight =mass x gravity
參考: myself
收錄日期: 2021-04-14 18:45:27
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080217000051KK00794