This week we learned more about energy and how to calculate it. We learned what joules, watts and power is. We also used the results of an experiment that we did last week to get practice on finding joules, watts and power. The experiment was where we had our class run up the stairs in groups and time themselves. Using these measurements, we could find joules, watts and power.
We learned that joules are a measure of energy. You find it by doing the equation massXgravityXheight. To get watts you just divide that whole equation by the time. Finally to get the horsepower, you multiply the watts by 0.0013. We also learned that power is a rate of joules/time.
The experiment where we had people run up the stairs really helped me learn about joules, watts and horsepower. Everyone timed how fast they could run up the stairs and we put everything into the equation to get joules. It all started to make sense to me when everything had a place in its equation and we could get a number that represented the energy.
We also had an assesment this week. It was about everything that we had learned about energy. I was very thankful for the review the day before because there were still some things that I hadn't really understood up until then. Things like the fact that power is a rate and not a unit and the difference between power and work.
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