Make sure your results for energy are in Joules so everything needs to be in m and kg. Remember work is force times distance and in this case your work in lifting cylinder is giving it potential energy. Note that as the cylinder the . This potential energy is then being converted into KE on the wasy down. So the change in PE is negative and the change in KE is positive, but they should be equal amounts.
If you are having difficulties, give it a good shot, but we will go over it on Monday. Since the report is not due til Tuesday for Section 2 you should have enough time to write your report.
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