arihantsinghi said:
Sorry for the blurry image. I have attached the scanned Pdf. I hope this is clearer. If you still need a Latex file please inform me. Thanks
Please put the words into your message, not scribbled within your scanned image.
The problem had been posted in another sub-forum here previously. So some inside information is available.
The situation as I understand starts with an elevated hinge. The anchored side of the hinge can be thought of as attached to a cart that is free to slide horizontally and frictionlessly to the right and left. The cart is anchored vertically and rotationally. A leftward external force ##F_\text{ext}## is applied to the cart.
There is mechanism within the hinge that exerts a torque ##T## on the free side of the hinge. The hinge is otherwise frictionless.
Attached to the free side of the hinge is a rigid and massless rod that extends to the right and down. There is an upward bend somewhere in the middle of the rod. The rod continues with a straight section extending further to the right.
The bend is at exactly the right angle so that the straight section of the rod sits level and flat on the ground.
The question is about the lowest value of ##T## that can produce enough static friction to prevent the rod+hinge+cart assembly from being pulled to the left by the external force ##F_\text{ext}## on the cart.
I would suggest that the system is
statically indeterminate. The answer hinges on determining a center of pressure of ground on rod. But if all components are assumed to be perfectly rigid then the position of that center cannot be determined from the given information.
Still, an answer can be obtained by treating the center of pressure as falling within a permissible range of positions and looking for an extreme case.
It is also possible that this is a question about real world materials, stresses and resulting deflections. In that case, more information is required before an answer can be obtained. We would need to know about the stiffness of the various materials. How do they deform under load?