Phys Lab Ballistics Lab

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School

Edmonds Community College *

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Course

110

Subject

Physics

Date

Dec 6, 2023

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docx

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2

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Uploaded by EarlComputer478

1. What would happen to your v 0 and δv 0 values in Section 3.1 if you did not cock the launcher to the same position every time? Would this have introduced a type of error to your experiment? If so, what kind? The associated error ( δv0) would increase if the launcher was not set to the same angle and height every time. This would cause the measurements to vary between each try. The initial speed would also increase since that is how your calculated associated error increases. A higher initial speed represents a larger associated error and both measurements would increase if this occurred. 2. How would your photogate measurements have been affected if you had set the photogate beam above or below the center of the ball? If we put the photogate beam either above or below the center of the ball, it would not have been accurate. With the photogate beam at the center of the ball, it has the same width and height on each side so it’s recording accurately. Set above or below the ball, the photogate would not record the same way. I would assume that if the photogate beam was higher, the measurements would be higher and if the photogate beam was lower, the measurements would be lower. 3. How would your measurements have been affected if you had done this lab on the moon outdoors? Would values increase, be reduced, stay the same? Specify which measured parameters would have been impacted, in what way, and why. If this lab was done on the moon outdoors, the gravity would be 1.62 m/s 2 compared to earth's gravity at 9.8 m/s 2 . This difference in gravity means that because of the lower gravity, it would be slower as the gravity is slower on the moon. This is because of microgravity. Microgravity is when things seem to be weightless so in this scenario, it will read a slower time and have a shorter distance traveled on the moon compared to when measured on the earth. 4. How would your measurements have been affected if you didn’t have the photogate close to the mouth of the launcher? If the photogate wasn’t as close to the mouth of the launcher the measurements would be inaccurate and the data would not be collected correctly. It will gain velocity when it drops down not as close to the photogate. Because of the high speeds it will be collecting, the photogate readings will be less and the measurements will be inaccurate.
5. Which of the two methods used to find the muzzle speed do you think is the most accurate, and which method was the most precise? Explain why you think so, reference types of errors that might have been more present for one method than another to justify your answers. I think that projectile motion is the most accurate when finding the muzzle speed because we record the distance and height the ball is launched at, which we can use to solve for time using our equations. After solving for time, we can solve for an equation to solve for speed and that is more accurate than using the measurements for speed given by the photogate which has a high amount of possible error. Error Discussion: Reading: - Vernier caliper: +- 0.01 cm - Photogate: +- 0.0001 s - Measurements of the table: +- 0.01 cm - Measurements of distance from table to where the ball landed: +-0.01 cm - Measures of the height of the bucket: +- 0.01 cm - Difficulty measuring around the handle Systematic: - Two tests did not agree - The expected and the data collected did not match which means that the systematic error was larger than our random errors from our devices - This could have been because my partner and I made a mistake when calculating the v0 and δv0 for part 1 or 2 - Rearranging equations multiple times Random: - The air in the room
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