v^2=v^2+2gh Solve for g?
回答 (6)
2015-09-04 7:17 am
✔ 最佳答案
V^2 = v^2 + 2gh <<< V is really V(f) and v is really V(i)... spacing .. justlikewritingasentence is important.
V(f)^2 = V(i)^2 + 2gh
2gh = V(f)^2 - V(i)^2
g = [V(f)^2 - V(i)^2] / [2h] <<< answer
2015-09-04 6:50 am
V² = v² + 2gh
v² + 2gh = V²
v² + 2gh - v² = V² - v²
2gh = V² - v²
2gh/(2h) = (V² - v²) / (2h)
g = (V² - v²) / (2h)
v² + 2gh = V²
v² + 2gh - v² = V² - v²
2gh = V² - v²
2gh/(2h) = (V² - v²) / (2h)
g = (V² - v²) / (2h)
2015-09-04 6:48 am
[ V² - v² ] / [ 2h ] = g
2015-09-04 7:23 am
V² = v² + 2gh
Or, v² + 2gh = V²
Or, v² + 2gh - v² = V² - v² [Subtract v² from each side]
Or, 2gh = V² - v²
Or, 2gh / (2h) = (V² - v²) / (2h) [Divide by 2h on each side]
∴ g = (V² - v²) / (2h)
Or, v² + 2gh = V²
Or, v² + 2gh - v² = V² - v² [Subtract v² from each side]
Or, 2gh = V² - v²
Or, 2gh / (2h) = (V² - v²) / (2h) [Divide by 2h on each side]
∴ g = (V² - v²) / (2h)
2015-09-04 6:50 am
g = 0
2015-09-04 6:54 am
V2 = V2 + 2 gh , so V2 - V2 = 2gh , 0 = 2gh ,gh = 0 , so, g = 0/h , that is g = either 0 or undefined .
收錄日期: 2021-04-18 00:09:13
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150903224737AAAKofQ