Rude Goldberg

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Arizona State University *

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130

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Physics

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Feb 20, 2024

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Uploaded by MinisterMantis1707

Part 1: Lab Worksheet (20 points) 1. Give three examples, from the lab, where potential energy was converted to kinetic energy. (3 points) Three examples from the lab are when the slingshot was released, when the scissors cut the string dropping the weight and when the books fell in the bucket which caused the curtain to come down 2. Describe the adjustments you made to the Rube Goldberg device in order to keep the flow of energy going. (3 points) The adjustments I made to the Rube Goldberg device were interesting. I first had to tilt a platform to the left, I then had to move the 5lb weight and put it by the scissors, Next I had to tilt the catapult the other direction so the weight could push it up into the air, I then had to pull back the slingshot, and finally I had to move the bucket and put it on a string. 3. At the end of the lab all of the matter (such as the string, the ball and the books) stayed in the area. The potential energy, that was stored in the ball on the high shelf and suspended weights as well as the stored mechanical energy of the sling shot, had left the system in the form of sound, motion and heat. What type of energy system (open, closed or isolated) is represented by the lab device and why? (3 points) The type of energy system represented by the lab was a closed system because energy was able to leave the system, but matter was not able to leave causing a closed system 4. Provide an example of an isolated energy system and explain how it could be changed to create an open energy system. You may use the examples provided in the lesson or another example. (3 points) An example of an isolated system is our universe and to change our universe into an open system it would have to have matter or energy entering or leaving the system, so maybe something asteroids or meteorites would be able to leave our universe and possibly new rays of light could enter our universe from an unknown object. This is just a thought of how the universe could turn into an open system. 5. Describe how the law of conservation of energy is demonstrated in this laboratory activity. (3 points) The law of conservation of energy is demonstrated in the lab activity because all the energy that was used changed into different types of energy. An example from the lab is when the weight was dropped that energy changed into sound. That is just one example of how the law of conservation of energy is demonstrated in the lab activity

6. In order to participate in this laboratory activity, you needed energy. Where did your energy come from? What types of energy conversions took place that allowed you to complete the laboratory activity? Describe the three steps energy diagram presented below. If you need help There is an example of a simple energy diagram on the examples tab of energy conversions section of the Why page. You do not need to include images, only words. Be sure to include the types of energy you are demonstrating. (5 points) The energy in the activity came in many forms such as potential and kinetic to name a few. The types of energy conversions that occurred were gravitational energy from when the weight was dropped and when the book fell, also mechanical energy for when the ball rolled down the pillar and elastic energy from when the ball was shot from the slingshot. The three-step energy diagram can be described as you have energy then the energy is changed to some new form of energy and then finally the energy will stay that way or be changed into another new form of energy Part 2: Design your own Rube Goldberg Device (30 points) Have you ever wanted to be an inventor? Now is your chance! For this portion of the assessment you will design your own Rube Goldberg device. Rube Goldberg devices use simple everyday items and take advantage of simple potential to kinetic energy conversions. When several of these conversions are combined, the device is able to perform a simple task, just like the one in the lab activity. You do not need to build your device. You must draw it and explain how it will work. You can draw the device freehand and scan or photograph the drawing for submission to your instructor. You may also use a draw paint program on your computer. Your description must include the energy conversions that take place. If you would like to build your device, you do not need to include a drawing; however, you will still need to provide a written description of the energy conversion (potential–kinetic) that take place in your device. If you build your device, you will need to turn in a video clip or photograph of the device with the written description of energy conversions on this worksheet. You will be awarded points as follows:

How It Works: My Rube Goldberg device works because first the ball is hit and falls into the bucket which makes the bucket go down eventually hitting the catapult. The all on the catapult is thrown into the air is caught by the wind of the hair dryer. The wind pushes the ball to the slingshot which then releases another ball that hits the remote control of the car which makes the car mov forward until it flies off the ramp eventually turning on the light bulb. Types of energy conversions that took place are thermal, elastic, mechanical, electrical, radiant and gravitational energy. Labeled energy conversions: 1. Mechanical 2. Gravitational 3. Mechanical 4. Elastic 5. Electrical 6. Radian and thermal because of the light switch turning on the light bulb Drawing and written description: Analysis Questions (10 points): 1. The Rube Goldberg device included in the lab is, an example of a closed system because all of the matter (such as the string, the ball and the books) stayed in the area. However the potential energy, that was stored in the ball on the high shelf and suspended weights as well as the stored mechanical energy of the sling shot, had left the system in the form of sound, motion and heat. Now, take a look at the device you created and explain what type of energy system (open, closed or isolated) is represented by the lab device and why? (2 points)

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My Rube Goldberg device is a closed system because energy was able to leave the system, but matter was not able to leave causing a closed system. An example was when the bucket hit the ground, it created sound which left the system but at the same time the bucket stayed in the system which makes it a closed system 2. In the lesson a thermos is presented as an example of an isolated energy system. How could you change the thermos into an open energy system? (2 points) You could change the thermos into an open energy system by removing the lid and adding sunlight and water into it or you could have the water and darkness inside leave the system 3. Describe how the law of conservation of energy is demonstrated in the device you created. (3 points) The law of conservation of energy is demonstrated in my device because all of the energy formed into different types of new energy which caused the law of conservation of energy to occur 4. Describe two places in your device where potential energy is converted into kinetic energy. (3 points) Two places in my device where this occurred was when the slingshot was released and when the ball was hit and stared to move down the pillar.

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