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講問小弟做得岩唔岩。如果唔岩，請糾正。
中三物理的問題（急！！）
2010-01-29 3:50 am
回答 (1)
2010-01-29 10:00 pm
✔ 最佳答案
Your calculations to the two questions are right.In Q1, you may use a suuplementary equation of motion in case the initial velocity u is unknown. The quation is,
s = vt - (1/2)a.t^2
In Q1, we have v = 0 m/s, a = -10 m/s2, s = 1/2 s, s = ?
hence, s = -(1/2)(-10)(0.5)^2 m = 1.25 m
收錄日期: 2021-04-29 17:31:29
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100128000051KK01312