Tension of cables of unequal length

AI Thread Summary
In the discussion about the tension in cables of unequal lengths supporting a uniform mass, the main question revolves around whether the tensions T1 and T2 are equal. It is suggested that if the tensions were unequal, the mass would rotate around its center of mass, indicating that the tensions must indeed be equal to maintain equilibrium. The calculation of tension involves analyzing the forces and moments acting on the mass. The conversation emphasizes the importance of considering the center of mass and the balance of forces. Ultimately, for a uniform mass suspended by unequal cables, the tensions must be equal to prevent rotation.
mikejones222
Messages
2
Reaction score
0
While doing some "what is the tension in cable" of hanging masses problems, I thought of the following scenario: a mass, uniform in density, is suspended by two cables of unequal length (See attachment)

Assuming that the mass is uniform in density, would T1 be the same as T2? Intuitively, it seems as though T1 may be less, but wasn't sure. If it's not, then how would one go about calculating the tension?
 

Attachments

  • mass hanging slanted.png
    mass hanging slanted.png
    7 KB · Views: 577
Physics news on Phys.org
Hi mikejones222! http://img96.imageshack.us/img96/5725/red5e5etimes5e5e45e5e25.gif

You draw the 3 forces: what you've shown together with weight acting down through the centre of mass. Sum of moments about any convenient point = 0. :wink:
 
Last edited by a moderator:
riiiight...if tensions were unequal, then the mass would rotate around it's center of mass...thanks:)
 
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Thread 'Variable mass system : water sprayed into a moving container'
Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
Back
Top