Investigation of Pulleys free essay sample

This is due to the fact that less effort is used when there are more wheels, meaning that there is a smaller number to be divided into the never changing load (9. 8 N). As for the efficiency, with the increasing number of wheels it decreases. This is because efficiency is (100% x Work output) / Work input and as the wheels increase the work output becomes less than the work input. Sources of Error: Our main error was in the presence of friction. It was basically unavoidable and was attained through the strings rubbing against each other and through the strings rubbing against the pulleys. Another error that could have occurred was not having a sufficient amount of time to complete the lab and fully analyze the results. The last probably apparent error was in the calculations and recording of data, this is because human error is hard to avoid. Conclusion: Theoretically, the work done should be the same each time. We will write a custom essay sample on Investigation of Pulleys or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page When the effort force was greater, the distance we had to pull was less. However, when the effort force was less, the distance it needed to be pulled was greater.