- #1
Korisnik
- 62
- 1
Homework Statement
The chain comprising three rings (each of mass ##0.25kg##) is suspended from a massless rope, and a pulling force ##\left(F=9N\right)## is exerted upwards on the rope. Picture: http://i.imgur.com/xeaiBsc.jpg?1.
I need to find the values of all the unknowns.
Homework Equations
$$a:\ F_y=F_R +w_a=m_aa_a\\
b:\ F_y=F_R+w_b+F_{c,b} =m_ba_b\\
c:\ F_y=F_{b,c}+w_c+F_{d,c} =m_ca_c\\d:\ F_y=F_{c,d}+w_d =m_da_d$$
The Attempt at a Solution
I'm not sure how to solve the problem without assuming that the acceleration of each ring is equivalent to the acceleration of the whole chain ##\left(a_a=a_b=a_c=a_d\right)##. However, I don't know the law/fact that hypothesis is a consequence of.