Force and Newton's 2nd, weird lab results

[Woodpecker]

Homework Statement

Not really a problem, but an analysis question on a lab that I can't figure out. We did an experiment in which we placed a spring scale on a table and attached strings to both sides. The strings went over pulleys and we hung various masses from them. My question is what should the spring scale have read when different masses were hung from each string (ex. 150 grams on one side, 200 on the other)?

Homework Equations

F=ma

The Attempt at a Solution

As far as I can tell, the spring scale should have shown the net force acting upon the whole system. But it only did so inconsistently and with number fudging. Of course, that could have been due to the fact that the force had to be read off a spring scale accelerating away from me at 9.8 m/sec. sq. Overall, not a very well-designed experiment. But anyway, am I correct with the above hypothesis?

 

[qspeechc]

It could be the acceleration of the scale affected the little arm that points to the measured value. It should read the difference between the weights.

 

[ogb p]

As a scientist, it is important to always approach experiments with critical thinking and a willingness to question the results. In this case, it is possible that the inconsistencies and difficulties with reading the spring scale were due to human error or flaws in the experimental setup. It is also important to consider the limitations of the equipment used, such as the spring scale and its potential for inaccuracies.

Based on Newton's Second Law, the spring scale should have read the net force acting on the system, which would be the sum of the forces from both masses. However, it is important to note that the spring scale may not have been able to accurately measure this force due to its limitations. Additionally, the acceleration of the spring scale may have also affected the readings.

In order to improve the accuracy and reliability of the results, it may be necessary to repeat the experiment with various adjustments to the setup, such as using a more precise measuring device or reducing the acceleration of the spring scale. It is also important to carefully analyze and interpret the data to determine any potential sources of error.

Overall, it is important to always approach experiments with a critical and analytical mindset, and to consider all factors that may affect the results. By doing so, we can continue to improve our understanding of scientific principles and accurately interpret experimental data.