We conducted an experiement in class where we suspend a 1m ruler at the 50cm mar

Question

We conducted an experiement in class where we suspend a 1m ruler at the 50cm mark so it was balanced horizontally, we then hung a known mass on one side fo the ruler and an unknown mass on the other end of the ruler. We then calculated the mass of the unknown mass from the mass of the known object and the distance from the 50cm suspension point to each mass. Each group then recorded their reuslts on the white board. It was found that each group recorded slightly varying results. The question posed to us is what are some reasons why the experimental procedure and/or apparatus give slightly different values for the unknown mass for each group, excluding human error nor the unknown mass's being different as reasons.

Explanation / Answer

1) instrumental error: it is caused due to defective alignment of the instruments....

2) error due to imperfection..- it is due to some inferction in insrument ..example: scaling of the ruler may be not perfect...

3) random error:-- it is take place due to different groups has taken observation randomly

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