physics ，please help～?
2016-12-07 9:07 am
有一個graph，x-axis represents s/m y-axis represents v -square/m-square s-2.有條線斜上，對番x-axis and y-axis,分別係1and 2.問 what is the acceleration of the particle？（Ans：0.5ms-2）
回答 (1)
2016-12-07 3:32 pm
✔ 最佳答案
You only gave the coordinates of a single point (1,2), which cannot determine a straight line. At least two points are needed to fix a straight line.From your given answer, I suppose the straight line doesn't pass through the origin. It should have a y-intercept of 1 (m/s)^2
Hence, based on the equation of motion:
v^2 = u^ + (2a).s
i.e. 2 = 1 + (2a).(1)
thus, 2a = 1
a = 0.5 m/s
收錄日期: 2021-04-11 21:32:42
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20161207010735AAqg0Ix