- #1
Direction of rotation of moment
AI Thread Summary
The discussion centers on the confusion regarding the direction of rotation of moments M1 and M2, with a consensus that they should rotate clockwise and point downwards according to the right-hand grip rule. Participants express skepticism about the accuracy of the arrow directions in the textbook, suggesting they are not meant to be taken literally but rather to indicate forces and couples. There is an agreement that the author may not have prioritized consistency in the direction of moments for the sake of clarity in the overall concept being presented. The focus remains on understanding the principles rather than the specific representations in the textbook. Ultimately, the conversation highlights the importance of grasping the underlying mechanics rather than fixating on potentially misleading illustrations.
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...
This problem is two parts. The first is to determine what effects are being provided by each of the elements - 1) the window panes; 2) the asphalt surface. My answer to that is
The second part of the problem is exactly why you get this affect.
And one more spoiler:
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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