Stuff about the lab worksheet

Stuff about the lab worksheet - 2 too small probably...

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So when you do the lab you will notice that your answers to #17 and #18 on the Chapter 4 Lab Worksheet are not really that close to each other. Question #19 asks you to compare the two numbers, and the two numbers are about 20% apart. What to do? What I want you to do is to say that the two numbers are pretty close together. One is about 2500, and the other is about 2000. If I said that a hamburger costs $2.00, and you end up paying $2.50 at the restaurant, you probably won t be angry or surprised or whatever. Those two prices are pretty close together. But what is the reason for the difference? If you graphed the inverse of the total mass 1 total m vs. the acceleration you will get a line. That line will have an intercept. In one class data from a few years ago, the equation of the line was 05 . 0 4752 1 total m a . That means that the acceleration is 0.05 m/s
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Unformatted text preview: 2 too small, probably because of the slope of the table or friction or whatever. This is the kind of thing you talked about in your answers to questions #13 and #14. Your actual intercept will be different. It may be positive. That means your acceleration values are too big. If you were to go back to your data tables and add in the 0.05 m/s 2 that is missing, you would have the “ perfect ” acceleration values that you would get with a perfect table, no friction, etc. If you graph these “ perfect ” acceleration values vs. the total mass, your best fit curve would have an exponent closer to -1. The coefficient of the function would be much closer to 2000. Your answers to #17 and #18 would be much closer together. Your answer to #19 would be easier to figure out....
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This note was uploaded on 02/10/2012 for the course PHYS 123 taught by Professor Phys123 during the Spring '10 term at Buena Vista.

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