4. Discussion

4. Discussion 4.1 Key findings & Analysis of results After the experiment, we have concluded that the rougher the surface, the larger the coefficient of friction measured. By carrying out the same experiment with two different objects of different weights, we can measure the coefficient of friction by dividing the weights needed to move the object and the newtons measured. We believe that with this data, we can provide a reliable source of information for the viewers of the experiment. Due to different issues that might have affected the results of our experiment, the results of our experiment are flawed in certain ways, in which the coefficient of friction between two different solid surfaces should not exceed 1.00 units when measured grams of weight needed to move/ newtons needed for the object to move. 4.2 Explanation of key findings When we repeated the experiment thrice, we were ensuring that there was as little error as possible. From our graphs above, we can conclude that the higher the coefficient of friction, the rougher the surface is. 4.3 Evaluation of Hypothesis From our tables above, we can conclude that our hypothesis was correct. The rougher the surface, the larger the coefficient of friction 4.4 Limitations and Areas for improvement One of the problems during the experiment was the angle at which the pulley and block were placed at. The angle at which the pulley and block were placed at on different days could have impacted the amount of weights need to pull the block as a solution we could screw the pulley to the table so as to have a fixed angle throughout the experiment. The second problem we encountered during the experiment was that the pulley also generated friction and so increased the weight needed to pull the object. As a solution we could use a lighter pulley The third problem we faced is the weights available are limited. Everytime we increased the weight, we had to increase it by 10 grams as there was no smaller or lighter weights. This could have caused us to record a weight value that was over the minimum weight for the block to move