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#26 Re: Help Me ! » Try Out: Matrixx Algebra!!! » 2010-07-01 21:03:50
Hi, nice to meet you. I'm new to this stuff.
for #1, we have n=1005, and hence we should have : dim(A_3/2)=n=1005 ??
#27 Re: Help Me ! » static on inclined planes » 2010-07-01 07:28:12
Hello, nice to meet you.
we have :
=> : Rcos(a)=P=mg => R=mg/cos(a)
and T=Rsin(a)=mg*tan(a)
m=46kg, g~9.81 kg*m/s^2, a=38°
#28 Re: Help Me ! » Mechanics - Newton's law of motion » 2010-06-29 03:51:55
Hallo, nice to meet you. I'm new in here.
let g be the acceleration of gravity, (i.e ~9.81m/s^2)
i) the tension is the sum of forces acting on a point of the string, hence : (0.7-0.3)g kg*m/s^2
ii) on the pulley act a force of (0.3+0.7)g=1g kg*m/s^2 (vertical)
Hope this is in some way right.
c ya.
#29 Help Me ! » Erase account » 2010-06-14 23:23:46
- jk22
- Replies: 1
Hallo,
I wanted to ask how to erase the account ? I considered that my exam to this was failed, and then useless to continue.
#30 Re: Exercises » Multivariable Calculus - Chain Rules » 2010-06-14 10:32:17
Hello, nice to meet you. I'm for the first time on this forum.
It was late, in fact the answer is no from the onset, because of unit incohence. (this I saw afterwards).
But I did the calculation
Since a long time that I haven't made this calculation, I did like :
then I squared the operators :
which gave :
It's not the same, but I don't know if an error went inside..sorry.
It was nice to meet you, but this failed. Bye.
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