Doubts on Measuring Efficiency of Pulley Experiment

  • Thread starter Thread starter Peter G.
  • Start date Start date
  • Tags Tags
    Uncertainties
AI Thread Summary
In measuring the efficiency of a pulley experiment, the key focus is on accurately determining the work input into the system. The experiment involved lifting a mass by exerting a force of 1.4 N over a distance of 0.05 m, with repeated measurements of the duration taken. A critical question arises regarding the uncertainty in distance measurement, specifically whether to use the smallest degree of accuracy of the ruler or half the range for calculations. Additionally, clarification is sought on the appropriate units for measuring the duration of effort, with options including seconds, minutes, and others. Accurate data processing is essential for reliable efficiency calculations in the experiment.
Peter G.
Messages
439
Reaction score
0
I am processing the data in my pulley experiment and I have a doubt.

I am measuring the efficiency, thus, I measured the work I inputed in the system. For when the mass being lifted by me was moved by 0.05m, I exerted a 1.4 N force and I had to exert that force for 0.275, 0.28, 0.285. (Those are my repeats)

My question is: The uncertainty for the distance I moved the force would be the smallest degree of accuracy in my ruler or half the range?

Thanks,
Peter G.
 
Physics news on Phys.org
What are the units for the duration of the effort? seconds, minutes, hours, fortnights?
 
meters.
 

Thread 'Errors and significant figures'

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...
View full post »
Thread 'A cylinder connected to a hanging mass'

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...
View full post »

Similar threads

Is my textbook wrong about absolute uncertainties?
Replies
2
Views
1K
How to Write #s w/ Uncertainty: Rules & Examples
Replies
2
Views
1K
Experimental Design: Pulley and Mass Hangers
Replies
30
Views
3K
Accelerating pulleys (3 pulleys and 3 masses)
Replies
5
Views
2K
Experimenting whether the diameter of a pot affects boiling time for water
Replies
15
Views
2K
Explain friction in a pulley system
Replies
13
Views
7K
What is the focal length of the lens?
Replies
20
Views
3K
Uncertainty Error and Significant Figures in this Force Tables Lab
Replies
4
Views
2K
Significant figures in practical investigation report
Replies
4
Views
2K
Basic doubts about measurements and fitting
Replies
7
Views
1K

Hot Threads

Recent Insights

Back
Top