The purpose of this lab was to calculate and find out the relationship between energy and velocity. In this lab we put a .38 kg glider on an air track, and measured its velocity when it passed through a photogate sensor we had set up about a foot down the track. We pulled the glider back, stretching a rubber band at .01 to .05 m and measured the velocity when the glider was released during each test. After the testing was completed, we graphed the data and came up with an equation explaining the reasoning behind our graph and its slope: E=1/2mv^2. This equation tells us that the energy of the glider is equal to half of its mass multiplied by the velocity of the glider squared.
Data:
The velocity and energy have a direct relationship:
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| X and Y coordinates of the graph below |
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| Graph showing the trend and relationship between Energy and the average velocity squared |
Connection:
A connection that we can make to the real world is eerily similar to our previous labs connection. Last week we figured out how to store energy in a rubber band, the connection being a bow. However, this week we basically tested the other part of a bow, the arrow. When we pulled the cart backwards, stretching the rubber band back, we were loading up the rubber band with energy. The further we pulled the rubber band back, more energy was stored and the glider would move faster. This is similar to a bow and arrow because the more you pull the string back, the faster the arrow will go- just like the glider and rubber band.
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