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Phsycis Case

Essay by   •  October 13, 2014  •  Essay  •  538 Words (3 Pages)  •  1,027 Views

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In this lab, the height of three objects are being determined. These objects are a person, a table, and the height of the class window. If a ball is dropped out of a higher height, than a prediction can be made that the time will be greater than from a lower distance. The data collected in this lab proves our hypothesis to be correct. This is true because when the ball was dropped from the height of the physics table at .94 meters tall, the time was .30 seconds. When the ball was dropped from the height of Vivienne, who is 2.0 meters, the time was .50. Vivienne is taller than the table, so the time the ball took to hit the ground was .50 instead of .30, which means it took longer. When the ball was dropped from the window, at a height of 11 meters, it took 1.0 seconds to hit the ground. This shows that something dropped from the tallest height, will take the longest amount of time.

There are numerous possible errors that could have taken place during this lab. The first one being a measurement tool error. When performing a lab, it is key that when timing something, it is made sure of that the device used to time, times accurately, or else the whole data set will be completely thrown off. For example, the timer used in this lab cannot measure time in small measurements passed milliseconds, therefore the time is rounded off. This may have very likely caused a small error in some of the many calculations of this lab. Another possible error, would be a calculations error. These types of error are extremely common mistakes and can easily shift the data. For instance, if someone forgets to add a digit of a number when inputting data into a calculator to calculate from a formula, the whole set of numbers would be completely inaccurate. It is very difficult to catch these errors and one must thoroughly check the data to scope out any. The last form of possible error, would have been another measurement error. The percent of error in calculated for the set of data in this lab was unusually high over one hundred percent. While there could have been many reasons for this, someone could have easily shifted the ruler while measuring, producing an inaccurate height, which could throw off the the formula and calculations for velocity and then acceleration. Therefore because of the extremely high percentage of error, the data from this lab is presumed to be inaccurate. From measurement error to human error, the chance of error is prevalent in all labs.

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