Physics

Yes, it is possible that your results differ from the expected results due to the different distances pulled for each mass. Hooke's Law states that the force (F) is proportional to the extension (x) of the spring, meaning that if the extension (x) of the spring changes, the force (F) will also change. Consequently, if you pull the spring down a greater distance for each mass, then this will increase the extension (x) of the spring and therefore increase the force (F) required to hold the mass in the same position. This increase in force (F) will result in a higher spring constant (k). Therefore, if the distance pulled was not consistent for each mass, then this would explain why your calculated spring constant (k) was different than expected.