Equilibrium - A rod influenced by multiple rope tensions

Join the discussion
Registration is free. Ask a follow-up in this thread, or start your own.
Sign up Log in
2 replies · 2K views
kastamonu
Messages
6
Reaction score
0
equilibrium -- A rod influenced by multiple rope tensions

Homework Statement



Smooth and identical rod has a weight of P. The rod seems to be in equilibrium with X and Y which has a weight of P. What can be the weight of X according to the values below?(ip means rope)

P , 6P or 9P

Homework Equations


The Attempt at a Solution



I tried to find the torque. First I found the gravity center of the rod. It is 2.5 units from X and 2.5 units from Y. And found the answer as
2.5P=2.5X and X=P. But according to my book there are 2 values for X. One of them is 6P and the other is P.
 

Attachments

  • tara0003.jpg
    tara0003.jpg
    5.4 KB · Views: 495
Last edited by a moderator:

Discussion

Physics news on Phys.org
Think about what happens if X gets heavier and heavier. When X reaches a certain weight, the rod will begin to rotate in which direction and about which rope?

Likewise, think about what happens if X gets lighter and lighter.