- #1
pedro_crusader
- 1
- 0
- Homework Statement
- I need to understand where the very first equation comes from?
- Relevant Equations
- torque?
Torques acting on a cylinder, with friction
- Thread starter pedro_crusader
- Start date
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- Tags
- Torque
AI Thread Summary
The discussion focuses on a problem involving a rolling cylinder that appears to be dragging a rod with a plate experiencing friction. Participants express the need for a detailed description of the problem rather than assumptions. There is confusion regarding the meaning of labeled arrows in the diagram, particularly the curvy arrows labeled ##\beta## and ##\omega##. A torque equation is mentioned, but its derivation is unclear without additional context. Clarity on these points is essential for a proper understanding of the mechanics involved.
- #2
- 15,751
- 8,943
Please describe the problem in detail not just part of the proffered solution. What is going on here? It looks like you have a rolling cylinder that is dragging a rod at the end of which is a plate with friction. However, this is only a guess and we do not like guessing if it can be avoided.
Furthermore, what do all these labeled arrows represent, especially the curvy arrows labeled ##\beta## and ##\omega##? Again, we do not like guessing.
That said, yes, the first equation looks like a torque equation. Where it comes from depends on details that we do not have.
Furthermore, what do all these labeled arrows represent, especially the curvy arrows labeled ##\beta## and ##\omega##? Again, we do not like guessing.
That said, yes, the first equation looks like a torque equation. Where it comes from depends on details that we do not have.
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19.
For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
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...
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:
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