PHYSICS INTERNAL ASSESSMENT
By: Salman Charolia
For the coffee filter paper, how does the mass, by adding items such as paper clip, affect the time for the coffee filter to fall from an initial height?
Design:
Problem: For the coffee filter paper, how does the mass, by adding items such as paper clip, affect the time for the coffee filter to fall from an initial height?
Hypothesis:
If the mass is increased then the time for the filter paper to fall will decrease because there is more force occurring on the object due to the increase in mass.
Manipulated Variable: Mass of Filter Paper
The mass of the filter paper will be changed by adding four paper clips after every five trials till it reaches a total of 16 paper clips. The mass will then be measured by an electronic scale to the nearest 0.1g.
Responding Variable: Time
The time of the filter paper to fall will be measured by a stopwatch. The filter paper will be dropped at an initial height of 2.54 m where time will start recording when the filter paper is dropped and stopped when it makes contact with the ground. The time will be recorded to the nearest .01s.
Controlled Variables:
Throughout this lab there will be variables in which cannot be changed or the data will be inaccurate. First off, you must have the same size PureBrew coffee filter paper with a diameter of 8cm on the bottom. By having the same size PureBrew coffee filter paper, it will have the same mass as the one investigated in this lab since there are many sizes for filter paper. You should also make sure you have the same size, material, and brand of paper clips. In this investigation large, silver metal, and Wal-Mart branded paper clips were used. If you have different size and materials as your paper c...
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To develop this investigation in order to get more accurate data and prevent errors here are some ways to improve this lab. For the first weakness, in which the filter paper would loose its shape, instead of using large paper clips with a great mass, one could use smaller paper clips with very little mass in order to keep the shape of the filter paper throughout the lab and make the data more accurate. If that does not work, one could layer the filter paper making the paper stronger and more difficult for paper clips to change the shape of the filter paper. For the second weakness, in which the observer could not stop the time right when the filter paper touches the ground, one could use photo gates and determine the time, in seconds, it takes from one photo gate to another using the logger pro software and taking that data making it more accurate and precise.
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