Two stone are thrown form the same point at the same time, vertically upwards with speed 30ms-1, and the other vertically downwards at 30ms-1. Find how far apart the stone are after 3 seconds.
Thanks a lot
收錄日期: 2021-04-24 08:14:09
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20210111034713AAgTiEt