Limitations and improvements

  • Thread starter DopplerFX
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In summary, a student is seeking to identify the limitations of their experiment in determining the mass of a metal rod and how to improve them. The experiment involves balancing the rod with additional weight and measuring the distance between the pivot and the hook. A graph was plotted and relevant equations were used. The student is asking for suggestions for improvements.
  • #1
DopplerFX
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Homework Statement


I am trying to determine the limitations to my experiment and thus how to improve them.
The experiment's objective is to determine the mass of a metal rod.
The rod is balanced every time another 1kg is added onto the end of the rod.
This means that the rod cannot be touching the clamp. (it has to be 'hovering' in between the jaws of the clamp)
A ruler with a precision of (+-1mm) was used
Ultimately, as the mass on the end increases, the distance (x) will decrease.
A graph was then plotted of (m), mass on the end of the rod against (1/x), 1/the distance between the pivot and the hook.
The setup is detailed below:

https://mail-attachment.googleusercontent.com/attachment/?ui=2&ik=401e948dbb&view=att&th=13646f85bd21f764&attid=0.1&disp=inline&safe=1&zw&saduie=AG9B_P_D6Q6VrNf2Vr2Br8SOfSkq&sadet=1332630638740&sads=Kdc3CmFjAgFH5owsYfUQG4Vliik


Homework Equations


Moment = Force x distance perpendicular to the line of action of the force
The linear cartesian equation: (y = mx + c) is equivalent to (m = MP(1/x) - M)
where m is the mass hanging on the end of the metal rod, M is the mass of the rod, P is a constant and x is the length from the pivot to the hook (where the mass is hanging).

Any ideas of the limitations and thus the improvements that could be made to this experiment? Thanks in advance.
 
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  • #2
DopplerFX said:

Homework Statement


I am trying to determine the limitations to my experiment and thus how to improve them.
The experiment's objective is to determine the mass of a metal rod.
The rod is balanced every time another 1kg is added onto the end of the rod.
This means that the rod cannot be touching the clamp. (it has to be 'hovering' in between the jaws of the clamp)
A ruler with a precision of (+-1mm) was used
Ultimately, as the mass on the end increases, the distance (x) will decrease.
A graph was then plotted of (m), mass on the end of the rod against (1/x), 1/the distance between the pivot and the hook.
The setup is detailed below:

https://mail-attachment.googleusercontent.com/attachment/?ui=2&ik=401e948dbb&view=att&th=13646f85bd21f764&attid=0.1&disp=inline&safe=1&zw&saduie=AG9B_P_D6Q6VrNf2Vr2Br8SOfSkq&sadet=1332630638740&sads=Kdc3CmFjAgFH5owsYfUQG4Vliik


Homework Equations


Moment = Force x distance perpendicular to the line of action of the force
The linear cartesian equation: (y = mx + c) is equivalent to (m = MP(1/x) - M)
where m is the mass hanging on the end of the metal rod, M is the mass of the rod, P is a constant and x is the length from the pivot to the hook (where the mass is hanging).

Any ideas of the limitations and thus the improvements that could be made to this experiment? Thanks in advance.

Want to try that image again?
 

What are the limitations of a scientific study?

The limitations of a scientific study refer to the factors or constraints that may affect the results, conclusions, or generalizability of the study. These may include sample size, selection bias, measurement error, and external validity.

How can limitations be addressed in a scientific study?

Limitations can be addressed in a scientific study by acknowledging them in the research design, data collection, and analysis processes. Researchers can also try to minimize their impact by using appropriate statistical methods and ensuring the study has adequate power.

What are some common improvements that can be made to a scientific study?

Common improvements to a scientific study include increasing the sample size, using more precise measurement tools, reducing bias in participant selection, and ensuring the study has high internal and external validity.

How do limitations affect the validity and reliability of a study?

Limitations can affect the validity and reliability of a study by introducing biases and errors that may compromise the accuracy and applicability of the results. For example, if a study has a small sample size, the results may not be representative of the larger population, reducing its external validity.

How can researchers mitigate limitations in their studies?

Researchers can mitigate limitations in their studies by being aware of potential biases and limitations and taking steps to minimize their impact. This can include using appropriate research methods, addressing potential confounding variables, and being transparent about any limitations in the study's findings.

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