- #1
What are the equations and solution for electrostatics?
- Thread starter asi123
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The discussion revolves around verifying the correctness of a solution related to electrostatics. Participants express uncertainty about the accuracy of the calculations, particularly concerning the magnitude and sign of the solution. A hint suggests that the solution can be deemed incorrect without calculations. There is a consensus that the sign should be opposite to that of charge q. Overall, the dialogue emphasizes the importance of understanding the fundamental principles of electrostatics in problem-solving.
- #2
Hootenanny
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You should be able to tell without any calculation that your solution is incorrect.asi123 said:
HINT:
Check the sign
- #3
asi123
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Hootenanny said:
Yeah, but what about the magnitude?
As for the sign, it should be opposite from q, right?
Thanks.
- #4
Hootenanny
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Looks okay to measi123 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:
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