Hooke's Law - System of Springs

AI Thread Summary
The discussion revolves around applying Hooke's Law to a system of springs, specifically analyzing the equivalent spring constants for different configurations. The user initially presents a problem involving three systems with varying spring constants and seeks assistance. Participants suggest replacing springs in parallel with an equivalent spring constant to simplify the analysis. The conversation emphasizes understanding the principles of springs in series and parallel to solve the problem effectively. Ultimately, the user confirms that they resolved the issue after receiving guidance.
noobish
Messages
11
Reaction score
0

Homework Statement



http://img529.imageshack.us/img529/3814/hookes.jpg

Assuming spring constant for system A (left) is k
Then system B (middle) is k/2 and system C (right) is 2k

http://img15.imageshack.us/img15/7238/87792676.jpg

How about this system? Thanks for helping.

Homework Equations





The Attempt at a Solution




 
Last edited by a moderator:
Physics news on Phys.org
replace the two springs in parallel with the spring with the equivalent spring constant. Now you have two springs in series.
 
noobish said:

How about this system? Thanks for helping.


How about it? Do you have a question? Showing us pretty graphs doesn't tell anyone what you're stuck on. Also, those bold sentences are there for a reason: use them. State the question, give the relevant equations, and show your attempt at a solution, and then maybe I can give you a hint (or someone else can -- I'm a beginning physics student as well, so I make a lot of mistakes!).
 
noobish said:
Assuming spring constant for system A (left) is k
Then system B (middle) is k/2 and system C (right) is 2k
Assuming you understand these statements, which describe the effect of adding springs in series or parallel, you can apply them directly to the new system. Hint: Start by replacing the bottom two springs by with an equivalent single spring.

Looks like rock.freak667 beat me too it! :smile:
 
Doc Al said:
Assuming you understand these statements, which describe the effect of adding springs in series or parallel, you can apply them directly to the new system. Hint: Start by replacing the bottom two springs by with an equivalent single spring.

Looks like rock.freak667 beat me too it! :smile:

rock.freak667 said:
replace the two springs in parallel with the spring with the equivalent spring constant. Now you have two springs in series.

Thanks. Solved it. =D
 
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...
Thread 'A cylinder connected to a hanging mass'
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...
Back
Top