My group Hannah, Keely and Jenny decided to do the experiment using different weights and then calculating its friction by the distance the weight travelled when flung from an elastic band.
Was it a fair test?Yes. It was a fair test because all the other factors in the experiment stayed the same except for the weight, which increased. This means that the experiment was fair.Difficulties that we occurred during the Experiment:During the experiment we had a few difficulties. One difficulty was that we had to always ‘fling’ the elastic band with the same force to make it a fair test and this was difficult because we were not always entirely sure that we were flinging it with the same force. Also we had to make sure that the surface of the floor or table we were using always stayed the same and that we did not move, this was also to ensure the experiment was safe because the smoothness of the surface will affect the friction that occurs.Safety:We had to make sure that safety was a priority we did this by ensuring we always wore safety goggles and behaving in a sensible manner with the elastic bands.Prediction:I predict that the heavier the weight becomes the less distance that it will go when it is flung from the elastic band.
I predict this because I think that the heavier the weight the more friction that will be caused hence slowing the weight down and meaning that it travels slower.ResultsWeightDistanceAverage50g13250g158.550g135100g71100g85100g8815052150g56.5150g46200g37200g45200g42Conclusion:My prediction that the heavier the weight the less far that that it will travel was proven correct by my results. This means that the heavier the weight the more friction it will create as the force it has on the surface is stronger.Force ResultsForce (N)1st2nd3rdAverage0.13.53.73.33.50.2131514140.326272726.5