1. What is the speed of the putty just before it strikes the ceiling?
2. How much time from when it leaves your hand does it take the putty to reach the ceiling?
更新1:
天同: Ans in (1) is wrong but (2) is correct.
天同: Ans in (1) is wrong but (2) is correct.
收錄日期: 2021-04-29 17:55:11
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120929000051KK00259