- #1
Esoremada
- 52
- 0
http://puu.sh/4IjIT.png
I don't quite understand why this is correct. My initial try was this... (the only difference is at the end, bolded)
r = 0.154m
period = 0.426s
rev per second = 1/0.426s
w = 2*pi*(1/0.426)
mg = Fn*cosx
Fn = mg/cosx
Fc = Fn*sinx = mg/cosx
= mg*tanx
mg*tanx = mv^2/r
mg*tanx = m(r*sinx)w^2
g*tanx = (r*sinx)*w^2
9.8*tan(x) = 0.154*sinx*[2*pi*(1/0.426)]^2
EDIT: So this way does work, why did the way in the screenshot get the same answer?
EDIT 2: Oh... I just did it wrong and coincidentally got a close enough answer to round to the right answer.
I don't quite understand why this is correct. My initial try was this... (the only difference is at the end, bolded)
r = 0.154m
period = 0.426s
rev per second = 1/0.426s
w = 2*pi*(1/0.426)
mg = Fn*cosx
Fn = mg/cosx
Fc = Fn*sinx = mg/cosx
= mg*tanx
mg*tanx = mv^2/r
mg*tanx = m(r*sinx)w^2
g*tanx = (r*sinx)*w^2
9.8*tan(x) = 0.154*sinx*[2*pi*(1/0.426)]^2
EDIT: So this way does work, why did the way in the screenshot get the same answer?
EDIT 2: Oh... I just did it wrong and coincidentally got a close enough answer to round to the right answer.
Last edited by a moderator: