- #1
HT3
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- 0
this lab is very similar to mine
basically i can only seem to derive a portion of the formula, I=mgb/al - mb^2
where b- radius, g-gravity, al- angular acceleration.
I do not get the right answer:
here is what i did do however,
Fnet=ma
T-mg=-ma (acceleration is downwards)
so T=(mg-ma)
so then
Tnet=I*al (where al is angular acceleration not acceleration)
so then
T*b=I*al
(b*mg-b*ma)/al = I
as u can see this is not the correct solution..but is a start
the solution i need to get to is
I=mgb/al - mb^2
can someone help me out - thanks :)
basically i can only seem to derive a portion of the formula, I=mgb/al - mb^2
where b- radius, g-gravity, al- angular acceleration.
I do not get the right answer:
here is what i did do however,
Fnet=ma
T-mg=-ma (acceleration is downwards)
so T=(mg-ma)
so then
Tnet=I*al (where al is angular acceleration not acceleration)
so then
T*b=I*al
(b*mg-b*ma)/al = I
as u can see this is not the correct solution..but is a start
the solution i need to get to is
I=mgb/al - mb^2
can someone help me out - thanks :)
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