Doubts on Measuring Efficiency of Pulley Experiment

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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.
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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.
 
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What are the units for the duration of the effort? seconds, minutes, hours, fortnights?
 
meters.
 

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