The Dent Stoppers 2020-2021
Presented By: Ehibor, Kate, and Jaclyn
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Problem:
The problem we are trying to solve in our community is that many people are getting their walls dented because of doors slamming into them. Our research shows that other people are also having this problem. Klimek says, “Several months ago, I paid to have a hole patched in my wall that the doorknob had punched through the drywall.” This shows that we are not the only people that are experiencing this problem.
Question:
The question we are trying to answer is: How does the acceleration of a door and the type of paint used to cover a drywall affect the depth of the dent in the drywall when the door hits it at different accelerations?
Research:
We learned that there are two different types of paint: oil-based paint and water-based paint. Also, oil-based paints produce stronger odors. On the other hand, water-based paint is easier to work with, dries quicker, and brings out less odors than oil-based paint. There are also five different types of paint finishes which are high-gloss, semi-gloss, flat/matte, satin, and eggshell. Water-based paints are more flexible than oil-based paints but oil-based paints are more durable than water-based paints when it comes to wear and tear. High-gloss finishes are the most durable out of the five finishes. Another thing we learned is that there are four major components in paint which are resin, additives, solvent, and pigment. The resin is the binder that holds all the pigments together. Additives are used to intensify the properties of the substance. Solvents behave as a carrier that help bind the pigments and resin together. Pigments are used to give paint its sheen and color.
(Click on a source to go there)
Source #9: “Solvents Uses & Properties: Chemical Safety Facts.” ChemicalSafety Facts.org, 8 May 2020,www.chemicalsafetyfacts.org/ solvents/#:~:text =Solvents in Paints and Coatings,from drying in mid-air.
Source #10: “What Makes Paint Durable?” Modamas Fine House Painting, 22 Jan. 2016
Oil-Based Paint
Water-Based Paint
Water-Based Primer
Hypothesis:
If we open a door into a drywall, (one unpainted, one painted with water-based paint, and one painted with oil-based paint) twenty times each, then the greater the acceleration, the deeper the dent, and the water-based painted wall will have the smallest dent. We think this because our research shows that water-based paint is more flexible than oil-based paint, making it less susceptible to cracking or denting.
Experiment:
Control Group: Our control group is the unpainted drywall.
Independent Variables: Our independent variables are the different types of paint we are using and the different accelerations of the door.
Dependent Variable: Our dependent variable is the depth of the dents in the drywalls.
Controlled Factors (Constants): How far the drywall is from the door, doing the experiment inside, using the same door, and are using the same doorknob.
Materials:
Price: $9.64
Price: $10.98
Price: $15.48
Price: $16.48
Price: $9.99
Price: $3.87
A door with a doorknob
Duck Brand 240200 Double-Sided Duct Tape, 1.4-Inch by 12-Yards, Single Roll
Price: $8.99
Phone with the app “ Arduino Science Journal” downloaded
Someone to help hold the drywalls
3 Paint Stirring Sticks
A ruler
Razor knife
Protective eyewear
2-4 paperclips
Clay/Play-Doh
Procedure:
When conducting this experiment, we first made sure we were being safe by:
Making sure we had our guardians' permission and parent supervision to use the razor knife.
Making sure no one’s hands and/or other body parts are near the place where the door will hit the drywall.
Having the person holding the drywall put on the gloves and protective eyewear.
Not pointing the razor knife at anyone at any point in time.
Not throw the razor knife.
Making sure no little person, (such as a baby sibling) is in possession of the razor knife.
After taking these precautions, we painted all three drywalls with the primer. Next, we painted one of the primed drywalls with the water-based paint, another one of the primed drywalls with oil-based paint, and kept one of the drywalls unpainted. Then, using the "Arduino Science Journal" app to measure the door acceleration, we slammed the door into each of the three drywalls twenty times each. Lastly, after slamming the doors into the drywalls, we used clay/play-doh to measure the dent depths.
Ecyber Vid (1).mp4A video of The Dent Stoppers measuring the door acceleration.
Dent depthA video of the Dent Stoppers Measuring the Dent Depth.
Data:
Analysis:
The Water-Based drywall has an average door acceleration of about 4.5m/s^2 and an average dent depth of 0.827 millimeters. The minimum door acceleration is 0.2m/s^2 while the maximum is 8.7m/s^2. On the other hand, the minimum dent depth is 0.098 millimeters and the maximum is 1.95 millimeters. The “Water-Based Drywall - Door Acceleration vs. Depth of Dent” graph shows that the water-based drywall does not seem to have any outliers.
The Oil-Based drywall has an average door acceleration of about 4.205m/s^2 but has an average dent depth of 1.112 millimeters. The minimum dent depth is 0.195 millimeters while the maximum is 2.145 millimeters. On the other hand, the minimum door acceleration is 0.2m/s^2 and the maximum is 14m/s^2. The “Oil-Based Drywall - Door Acceleration vs. Depth of Dent” graph displays that the door acceleration does have an outlier; one of the door accelerations is 14m/s^2.
The Unpainted drywall has an average door acceleration of about 3.43m/s^2 but has an average dent depth of 1.258 millimeters. The maximum door acceleration is 7.6m/s^2 while the minimum is 0.2m/s^2. On the other hand, the minimum dent depth is 0.585 millimeters and the maximum is 2.34 millimeters. The “Unpainted Drywall - Door Acceleration vs. Depth of Dent” graph illustrates that there is no outlier.
The “Depth of the Dent vs. Door Acceleration” graph is a graph with all of the dent depths, door accelerations, and drywall types. In this graph we saw that for the most part, the water-based drywall had the lower dent depths, the unpainted drywall had higher dent depths, and the oil-based drywall was towards the middle.
The graph called, “Depth of the Dent Avg. vs. Door Acceleration Avg.” has the averages of all the door accelerations and dent depths for each drywall. It shows that even though the water-based drywall has the highest average door acceleration (4.5m/s^2), it still has the lowest average dent depth (0.827 mm). However, the unpainted drywall has the lowest average door acceleration (3.43m/s^2) and the highest average dent depth (1.258 mm). The oil-based drywall is in between the other two drywalls for both the average door acceleration (4.205m/s^2) and average dent depth (1.112 mm). The “Depth of the Dent Avg. vs. Drywall Type” graph shows how much of a difference there was between the three drywalls’ dent depths.
Based on the data on the experiment we did, the water-based paint is the most durable out of the two. We know this because, according to our data, the water-based drywall has the highest door acceleration average of 4.5m/s^2, but it has the lowest dent depth average of 0.827 millimeters. Also, the oil-based drywall has a lower door acceleration average (4.205m/s^2) than the water-based drywall. However, the oil-based drywall’s dent depth average (1.112 mm) is higher than the water-based drywall. Using this data, we can see that the water-based paint is most durable because despite having the highest average acceleration, it has the lowest average dent depth.
Conclusion:
In this experiment we were trying to answer the question, “How does the acceleration of a door and the type of paint used to cover a drywall affect the depth of the dent in the drywall when the door hits it at different accelerations?” For our hypothesis, we thought that if we open a door into a drywall twenty times, then the greater the acceleration, the deeper the dent, and the water-based painted wall will have the smallest dent. We thought this because our research shows that water-based paint is more flexible than oil-based paint, making it less susceptible to cracking or denting. Upon analyzing the data, we found the water-based paint is the most durable out of the two because even though it has the highest acceleration average (4.5m/s^2), it has the lowest dent depth average (0.827mm). Based on the data that was collected during the experiment, our hypothesis was supported.
During this experiment, several possible sources of experimental error occurred. First of all, if the door was a different distance from the drywall each time, the experiment would not be fair making the results inaccurate. Also, when measuring the depth of the dents, if we had typed in a number into our calculator incorrectly, the dent depths would be wrong. Lastly, if we used different types of paper clips that were various sizes and widths, it could affect how many paper clips we stacked to measure the dent depth which affects the data.
By avoiding or fixing the experimental errors, the results would be more reliable. In the future we could investigate the durability of different paint finishes. We could also test the different types of water-based and oil-based paints.
Abstract:
Many people are getting their walls dented because of doors slamming into them. So, to solve this problem, The Dent Stoppers answered the question, “How does the acceleration of a door and the type of paint used to cover a drywall affect the depth of the dent in the drywall when the door hits it at different accelerations?” Utilizing our engineering skills, we researched and informed ourselves about the different types of paints and how they are made. This information helped us form our hypothesis, using science, that if we open a door into three different drywalls, (one unpainted, one painted with water-based paint, and one painted with oil-based paint) twenty times each, then the greater the acceleration, the deeper the dent, and the water-based painted wall will have the smallest dent. To answer this question, we slammed a door into three different drywalls, (water-based painted, oil-based painted, and unpainted) twenty times each, and utilized technology by using the “Arduino Science Journal” app and our math skills to measure the door acceleration. Then, also applying our math skills, we used clay to measure the dent depths. Our data conveys that the water-based drywall had the smallest average dent depth of 0.827 millimeters while the oil-based painted drywall had an average dent depth of 1.112 millimeters, and the unpainted drywall had an average dent depth of 1.258 millimeters. Thus, our hypothesis is supported by our data.