Procedure: This picture shows the whole set up of how the lab looked. We had a platform with two spinning disks in which they were allowed to rotate without friction using the hose, with an air source, which was found within the platform. The air flowed in between the disks so that we could allow them not to touch which was meant to simulate no friction. The disks also had a hole in the middle so that air could be let out but since that was not necessary for the experiment, a pin to close up the hole was used. The whole system also had a string attached to the pin and at the end was a hanging mass which was used to help measure the angular acceleration of the disks.
The data was acquired using Logger Pro and the experiment was run multiple times and each of them with specific conditions to show the relationship between angular velocity and time and therefore acquire an angular acceleration. These conditions included changing the weight of the hanging mass, changing the weight of the disks and torque pulley.
Data: The graph below shows an example of one the test trials we did. The data table on the right gives us a set of angular velocity and time.
The graph below shows the actual first trial we did that went into our data.
This graph shows the result of the angular acceleration after doubling the hanging mass.
The final graph we documented was of when we tripled the hanging mass. As seen, the angular acceleration decreases the more the mass is increased.
The chart below shows were all the data was acquired from the graphs. We decided that no more graphs were necessary because all of them have the same picture but with different slopes because the angular acceleration is always different depending on the conditions.
Calculations: There were no calculations because this lab was to see the relationship between angular velocity and time in order to get the angular acceleration of the whole system.
Summary: Overall, the lab was successful because the trends that are seen make sense. If the hanging mass is doubled then the angular acceleration is doubled and if the hanging mass is tripled then the angular acceleration is also tripled. To add on, if the radius is increased then the angular acceleration increases which makes sense since angular acc = radius x translational acceleration. One more trend was if the weight of the spinning disk is decreased then the angular acceleration is increased.
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