Objective:
The objective of this laboratory was to theoretically calculate the moment of inertia of a disk and a ring and then to verify the moment of inertia for both objects through experiment. This laboratory shows that while the theoretical is not within the uncertainty of the experimental, both values are extremely similar to each other.
Data and Analysis:
Data:
Table 1: The Angular Acceleration of No Ring and Ring
Trial No Ring Ring
5g 4.57 ± 0.005 rad/s2 1.32 ± 0.005 rad/s2
10g 13.16 ± 0.005 rad/s2 3.09 ± 0.005 rad/s2
15g 20.45 ± 0.005 rad/s2 4.83 ± 0.005 rad/s2
20g 27.89 ± 0.005 rad/s2 6.60 ± 0.005 rad/s2
25g 35.65 ± 0.005 rad/s2 8.35 ± 0.005 rad/s2
Table 2: The Average Experimental and Theoretical Moment of Inertia for No Ring and Ring
Type Experimental Moment of Inertia Theoretical Moment of Inertia
No Ring 0.000198 ± 0.000047 kg•m2 0.000133 kg•m2
Ring 0.000631 ± 0.000101 kg•m2 0.000503 kg•m2
Analysis:
After completing the experiment, the data was transferred from DataStudio to Excel file, Lab9. Next, the points in the data when it started to increase were removed from the data points because that was when the 3-step pulley spun the opposite way of its original direction. This caused the mass hangar to be pulled back up and our experiment focuses on the just the drop. After deleting the excessive data, a scatter plot was created for all five trials for both the No Ring and the Ring. Then a trendline was added for the trials and the option to show the linear equation was selected. From the graph, the angular acceleration was determined by taking the slope from the equation shown on the graph of each trial.
After finding the angular acceleration, the experimental moment of inertia was calculated for all the tria...
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...ertia of the No Ring. The reason for this can be that the height of the 3-step pulley was changed during the experiment. Also, the angle of the clamp-on super pulley was changed in order to prevent the string from falling off the clamp-on super pulley during every trial. These are some of the things that were observed that have affected our results. There might multiple other changes that were done subconsciously by the experimenters without noticing.
In the future, the experiment can be improved by making sure that changes above, if required, are done before the first trial of the first run starts. Another problem was that the 3-step pulley moved slightly every time a trial was conducted. This could be prevented for the future labs by have a 3-step pulley that more resistible to movement. With these improvements, future laboratory might get more accurate results.
There were no significant error factors that may have affected the arrangement of the lab experiment. Everything went smoothly with relative ease.
The biomechanical principle stability for a pirouette is primarily concerned with the center of mass
Other human errors could have affected the results, such as not inverting the plate before putting it into incubation would not allow for bacterial growth. Not pipetting the tube up and down to mix the bacteria that settled at the bottom of the tube before starting the Gram Stain would not allow for an accurate reading because there wouldn’t be many bacteria on the slide. Passing the slide over the bunsen burner too many times, hence killing the bacteria and not allowing for a Gram Stain. If this experiment had to be redone, one improvement would be to allow for more than one plate without a point deduction. Unexpected human errors might interfere with a person’s results.
Going into details of the article, I realized that the necessary information needed to evaluate the experimental procedures were not included. However, when conducting an experiment, the independent and dependent variable are to be studied before giving a final conclusion.
Planning Firstly here is a list of equipment I used. Boiling tubes Weighing scales Knife Paper towels 100% solution 0% solution (distilled water) measuring beakers potato chips Cork borer. We planned to start our experiment by doing some preliminary work. We planned to set up our experiment in the following way.
Vrock= Vcenter of mass + Wrock Where V is the translational velocity, and W is the angular velocity
Results: The experiments required the starting, ending, and total times of each run number. To keep the units for time similar, seconds were used. An example of how to convert minutes to seconds is: 2 "minutes" x "60 seconds" /"1 minute" ="120" "seconds" (+ number of seconds past the minute mark)
However, a momentary tug on the string causes the friction between the string and the axle briefly to increase so that the axle no longer slips within the string. When the axle stops slipping, the rotational kinetic energy of the spinning yo-yo is large enough to cause the string to wind around the axle. This causes the yo-yo to begin to "climb" back up the string. After the first one or two rotations, the string can no longer slip, so the process of climbing up the string continues beyond the momentary application of the tug.
Rotational Inertia requires the object to rotate around its axis as opposed to how an object would behave wh...
There are many technicalities and terms associated with a successful device. Some of the main factors come from the materials used, and where they were used in the structure. Some are best used in one place, or another. All of this must be taken into consideration when deciding on how to best utilize the physics and forces applied to the boomerang. As it is a simple machine, it dominates in simplicity for a somewhat daunting task.
Saitoh M. On the performance of lumped parameter models with gyro-mass elements for the impedance function of a pile-group supporting a single-degree-of-freedom system. Earthq Eng Struct Dyn. 2012;41(4):623–41.
When riding on a roller coaster your seatbelt is not what keeps you seated. Centripetal force is the reason you stay seated on the roller coaster. Throughout this paper I will explain what it is and the difference between centripetal and centrifugal force is. Then how it happens and how it works in those situations. Finally I will explain how to figure out what the centripetal force is in a problem using formulas to solve it. Centripetal force is ubiquitous every day, but we fail to recognize it.
The circle of traction is a important racing concept with applications from physics. From newtons equation f=ma we know that the more force we apply to an o...
There is also the potential of human error within this experiment for example finding the meniscus is important to get an accurate amount using the graduated pipettes and burettes. There is a possibility that at one point in the experiment a chemical was measured inaccurately affecting the results. To resolve this, the experiment should have been repeated three times.
Possible sources of error in this experiment include the inaccuracy of measurements, as correct measurements are vital for the experiment.