- #1
Unhinged -- Static Equilibrium for a Door
- Thread starter ErCeTe
- Start date
AI Thread Summary
The discussion revolves around a homework problem involving the static equilibrium of a door, specifically analyzing the torque. Participants express concern over an incomplete solution that merely states the expectation of the door falling without sufficient explanation or diagrams. The feedback emphasizes the need for a more detailed analysis of the door's motion and the requirements of the assignment. Clarification is requested regarding the specific parts of the problem that need to be addressed. A more thorough approach is encouraged to achieve full marks.
- #2
berkeman
Admin
- 69,104
- 24,020
Welcome to the PF.ErCeTe said:
That is your full solution to all of those questions and drawings? I'm not expecting you to get full marks for that solution...ErCeTe said:
- #3
ErCeTe
- 4
- 0
No, that was for a) only.
- #4
berkeman
Admin
- 69,104
- 24,020
Well, first of all it's not correct (insufficient explanation of the door motion). Second, part a) asks for you to draw a number of things. Try again?ErCeTe said:
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:
Similar threads
Hot Threads
-
The problem of one tube and two balls on a plane
- Started by crazy lee
- Replies: 60
- Introductory Physics Homework Help
-
Collision of a bullet on a rod-string system: query
- Started by palaphys
- Replies: 70
- Introductory Physics Homework Help
Recent Insights
-
Insights Quantum Entanglement is a Kinematic Fact, not a Dynamical Effect
- Started by Greg Bernhardt
- Replies: 7
- Quantum Physics
-
Insights What Exactly is Dirac’s Delta Function? - Insight
- Started by Greg Bernhardt
- Replies: 0
- General Math
-
Insights Relativator (Circular Slide-Rule): Simulated with Desmos - Insight
- Started by Greg Bernhardt
- Replies: 1
- Special and General Relativity
-
Insights Fixing Things Which Can Go Wrong With Complex Numbers
- Started by PAllen
- Replies: 7
- General Math
-
Insights Fermat's Last Theorem
- Started by fresh_42
- Replies: 91
- General Math
-
Insights Why Vector Spaces Explain The World: A Historical Perspective
- Started by fresh_42
- Replies: 0
- General Math