Daniel Guzman
Rodrigo Uribe
Alejandro Rodriquez
April 5, 2017
Introduction
In this Lab, we are trying to figure out the relationship between theta and omega.
In this lab, we start with this apparatus that looks like a tripod and has a motor on the top. Connected to the motor has some rod. At one end of this is a string attached to it. The other end of the string has a mass to it. Put a piece of tape to the block. From a certain distance you set up a ring stand with photo gate on it , and you adjust it so the tape will pass through the photo gate. From this you can determine the time it takes to have one full revolution.
We can get the angle from looking at the right triangle with hypotenuse L and height H-h.
We can get the rotational speed by collecting how long it take to have ten rotations and divide that by ten.
We measure the height of the apparatus and how high off the ground the hanging mass is.
With this given info, we can calculate the rotational speed by applying free body diagram and by using the the period of 10 rotations.
After collecting data after 5 trials, we can calculate its respective rotational speed.
We can now compare the model and rotational by putting it on a graph and getting a linear fit.
We can then calculate the percent error by using the the slope of our graph as the experimental and the actual value of rotational speed as 1 radians/ second.
Conclusion
In this lab, I learned that we can apply our knowledge of Centripedal Force to real life application. I learned that although there is not that much difference from our model and actual omega, I think I would calculate omega by using the period of rotation since I would not get too much of an error.
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