Proficiency #1

My 1stProficiency is a pulley and i was seeing if a pulley would go faster with less or more weight. when i created this project i had in mind a crane and how it picks up weight so i added popcorn kernels into a bowl and kept the other one empty. The data was that with popcorn the 1st time i got 12.05 seconds. The 2nd time i got 7.14 seconds. The 3rd time i got 5.34seconds. I also did it without Popcorn and the 1st time i got 4.09 seconds. The 2nd time i got 3.57 seconds. The 3rd time i got 3.35 seconds. Well as you can see with less weight it does a lot better. In this experiment i examined and experimented ' How simple machines utilize mechanical advantage to transfer energy.