Phy高手請進@@
2007-11-13 3:59 pm
A bicyle slow down from 36 km h-1 at a rate of 1.5 m s-2. What is its speed after 2s?
回答 (1)
2007-11-13 4:39 pm
✔ 最佳答案
Original Speed of bicyle 36 km/hr = 10 m/sSpeed after 2 sec :-
= 10 m/s - (1.5m/s^2 x 2s)
= (10 - 3) m/s
= 7 m/s =
= 25.2 km/hr
參考: myself
收錄日期: 2021-04-13 14:29:15
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071113000051KK00535