- In this lab, we did an experiment and used our data points to derive an equation relating energy and velocity.
- We used a photogate sensor to record the launched cart's velocity. The set up of our experiment is shown in the following clip:
- We repeated this step using different distances to pull the cart back and recorded the velocity.
- After we had all our accurate data, we used a graphing app to graph our points. This Graph looks like this:
- Knowing the mass of the glider is about .4 kg, we were able to conclude that the slope of our line is 1/2 of the mass of the glider. with this information, we were able to derive an equation using Energy, Mass, and Velocity. Starting with the simple equaionof a line, y=mx+b, and the information from our graph, we derived the equation E=1/2mv^2. Since the energy we are talking about is the energy of movement, we substituted E (energy) for KE (kinetic energy).
- The energy that we give the rubber band by pulling it back, is transferred to the cart which creates it to move.
REAL WORLD CONNECTION:
- The idea of movement in this lab made me think back to the example of hitting a field hockey ball that I referred to in my first post, Mass vs. Force. When I use a force over the distance of my field hockey stick, I create energy. This energy is then transferred to the ball, which makes the ball move really fast, and create a noise.
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