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I need some help on solving this atwood problem. I already dound the first two components, I just need help figuring out how to and what equation to use for part C.) Please, solve out the entire portion if you can, because I have an idea of what equation to use, but I don't know HOW to solve for mass using it. Everything is provided in the pics! ty!

http://img.photobucket.com/albums/v84/Mittpuff/physics001.jpg
http://img.photobucket.com/albums/v84/Mittpuff/physics002.jpg

2007-09-30 14:46:14 · 1 answers · asked by Anonymous in Science & Mathematics Physics

1 answers

F= Ww - f - We
Ww =m1g counterweight's weight
We=m2g elevator's weight

F=ma= m1g - f - m2g
m=m1 + m2

m1a + m2a=m1g-m2g -f
m1g - m1a = m2a + m2g + f

m1=[m2(a+g) +f]/(g-a)

m1= [400 (2 + 9.81) + 100] /(9.81 - 2)=
m1=617.7 =618 kg

2007-09-30 15:00:58 · answer #1 · answered by Edward 7 · 0 0

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