An object is exerting a force when it pushes or pulls on another object. Objects commonly exert forces when they hit each other, as when a bat hits a ball. They can also exert a force with out touching.
I also noticed that the relationship worked very well for the first few values but not so fittingly for the later half larger forces. It was especially apparent with the largest results we had gained for each experiment; the line of best fit was a curved line.
The energy stored as a material is deformed is represented by the area between the curve and extension axis.
Energy is never used up and in this case, it is transferred into the margarine tub, which in turn uses this energy to drive its movement. My predictions Evaluation I think that my results are reliable because I had repeated each experiment three times and had gotten more or less similar results and it is probably accurate seeing as it fits into a pattern and the results show up as a relatively straight line.
Also, we did not move the rulers during the experiment nor the newton meter. There were anomalous results however, possibly caused by collision with dirt on the floor or an off centre impact with the tub; which may result in a change of direction or a different path of projection being taken.
If I was to do this experiment again, I would change the following things: In addition to this set of experiments, I would also like to measure the speed of the retraction of the elastic band and the extension of it so that I can incorporate it into some of the other rules of physics and see if it fits with my analysis.
If I had those results I could introduce momentum into the analysis as well. I could also test out some larger forces to see if the pattern mentioned in Graph 1 actually applies in this case.
The results I had attained did not quite show that pattern but it could have just been a small section of a bigger whole.
To measure the speed of the retraction, I would measure the distance of the extension and time the lapse between release of the rubber band and the impact with the tub and divide the distance by the time.
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