Problem statements
Solution video – H19.A
Solution video – H19.B
Reminder: Please submit HW19.A. No credit will be given for submitting the wrong homework assignment.
DISCUSSION THREAD
Please post questions here on the homework, and take time to answer questions posted by others. You can learn both ways.
For this problem, I solved for the maximum weight of C using only the tension in the cable between D and C (Td). While I believe my answer (Wc = Tdsin60 = We^(Ms*2.618 rad)sin60) to be correct, the relation between the tensions in the cables supporting C does not match the tension in cable CE (Te) using the tension ratio equation. Doing this, I got Te = W*e^(Ms*1.571 rad), which is not equal to Td cos(theta) as the FBD for block C requires. However, some online reading suggests that the ratio T_L/T_s is less than or equal to e^(Ms*B), which would validate my answers; at this weight, the left drum is impending slipping while the right drum is not. Can someone confirm this inequality?