Torque/Rotational Dynamics HW Problem

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A uniform thin rod weighing 100 N is initially supported by two vertical props at its ends. When one support is removed, the immediate force on the remaining support is questioned. Initial guesses suggest the force could be either 50 N or 100 N, but the discussion indicates that the problem involves rotational dynamics. The rod will rotate about the remaining support, and torque calculations can help determine the angular acceleration and subsequent forces acting on the system. Understanding the relationship between torque, angular acceleration, and the forces involved is crucial for solving the problem accurately.
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Homework Statement



A uniform thin rod of weight W = 100 N is supported horizontally by two vertical
props at its ends. At time t = 0 one of the these supports is kicked out. Find the
force on the other support immediately thereafter.


Homework Equations



Sum of forces??


The Attempt at a Solution



I really don't understand how to even approach this problem. My guess is that its 50 N because each support holds half of the rod. Any help would be greatly appreciated !
 
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Ok , I have a new guess now lol... 100N, since it is the only remaining force acting in the + y direction
 
I think your first guess was right, but I don't know how to solve this one.
I think it is a rotational motion question. It will rotate about the supported end. You can calculate the torque about that pivot and then find the angular acceleration. That is pretty much a complete description of the initial motion. What if you figure out from the rotational motion how the center of mass accelerates down and say it should fall the same way using F = ma where F is the total of the pivot force and the mg force?
 

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Thread 'Collision of a bullet on a rod-string system: query'

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In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
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Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
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