- #1
hang
- 7
- 1
- Homework Statement
- seesaw
- Relevant Equations
- torque
How Does Using ##m## Instead of ##M = 2m## Affect the Seesaw and Spring System?
AI Thread Summary
The discussion centers on calculating the torque about the pivot point S in a seesaw and spring system. The user initially calculates the torque from the plate's weight and the spring force but overlooks the impact of using ##m## instead of the correct mass ##M = 2m## for the disk. It is clarified that the weight of the rod does not contribute to torque since it acts directly on the pivot. The confusion arises from the incorrect mass assumption, which affects the overall torque calculation. Accurate mass representation is crucial for determining the system's behavior.
- #2
hang
- 7
- 1
The question ask to find torque about the pivot point S.
I first find the torque due to gravity of the plate and then torque due to spring force.
I understand that the weight of the rod do no torque as it is acting on the pivot S.
Where have I gone wrong?
I first find the torque due to gravity of the plate and then torque due to spring force.
I understand that the weight of the rod do no torque as it is acting on the pivot S.
Where have I gone wrong?
- #3
- 22,802
- 14,854
You used ##m## instead of ##M = 2m## for the mass of the disk.
- #4
hang
- 7
- 1
thank you so muchOrodruin said:
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:
F1=(5000+200)g=5200*10=52000N --> F2=(5000+100)g=5100*10=51000N ?
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