02_01_energy_worksheet M.C finsishag (2)

docx

School

Florida Virtual School *

*We aren’t endorsed by this school

Course

Subject

Mechanical Engineering

Date

Nov 24, 2024

Type

docx

Pages

Uploaded by DeaconDinosaurPerson507

Energy Lab Worksheet Name: Part 1: Rube Goldberg Interactive 1. Give three examples, from the lab, where potential energy was converted to kinetic energy. Example 1 The slingshot giving the ball potential energy whilst pushing it foward, then releasing it producing kenetic. Example 2 The slingshot shooting the ball hitting the book giving it potential energy, then the book falling, producing kenetic. Example 3 The red ball being hit by the steel balls pushing it foward into the green tube. 2. Describe the five adjustments you made to the Rube Goldberg device in order to keep the flow of energy going. Adjustment 1 Attatching the 5 lb weight to the shelf Adjustment 2 Rotating the cattapult the other way so the weight can drop correctly Adjustment 3 Attaching the bucket to the string Adjustment 4 Rotating the shelf to guide the ball down the tube Adjustment 5 loading the slingshot 3. Discuss how one of the adjustments you made in question 2 above was a constraint. Probably the slingshot, having to cock it back and give it enough force to push the books foward to create a domino effect, making them fall into the bucket and close the blinds. Part 2: Design Your Own Rube Goldberg Device 4. Rube Goldberg Design In this section, include a drawing, video clip, or image of your device. 5. Description Hand Crank (Mechanical to Mechanical): You turn a hand crank, which directly converts mechanical energy from your hand into mechanical energy that rotates the generator. Generator (Mechanical to Electrical): The hand crank is connected to a small generator inside the flashlight. When the crank is turned, it rotates the generator, converting mechanical energy into

electrical energy. Battery (Electrical Potential Energy Storage): The electrical energy generated is stored in a small rechargeable battery, transforming it into chemical potential energy. LED Bulb (Electrical to Light Energy): The flashlight includes a single LED bulb. When the you switch on the flashlight, the electrical energy from the battery is converted into light energy, illuminating the surroundings. Switch (Electrical to Mechanical): You interact with the device by using a simple on/off switch. This mechanical action triggers the electrical circuit to complete, allowing the flashlight to function. 6. Think about how constraints affected your design. If you created your device, explain one way you redesigned it after you tested it. If you created an image of a device, and did not actually test its function, then explain how you had to change your plan when you realized it would not work as you intended. It would definately work, worst case senario only for a few seconds would it produce light then would blow up in your hands. Part 3: Energy Conversions 7. Record your data in the chart and include at least 5 potential-kinetic energy conversions shown in your device's construction. Example Item Description of potential-kinetic energy conversion Example Book The book had gravitational potential energy when it was on the table. Then as the book fell off the table, it was in motion and had kinetic energy . 1 hand crank flashlight When you start cranking the handle, the potential energy stored in their hand muscles is converted into kinetic energy as they move the crank. 2 genera tor As you crank the handle, the kinetic energy of the crank's rotation is transferred to the generator, converting it into electrical energy. 3 batter y The electrical energy generated by the generator is stored in the battery, converting it into chemical potential energy. 4 led bulb When the flashlight is turned on, the chemical potential energy in the battery is converted back into electrical energy, which is further converted into light energy by the LED bulb.

5 switch The on/off switch, when operated, involves a conversion of electrical energy to mechanical energy to complete the circuit, allowing the flashlight to function. When turned off, it reverses the conversion from mechanical energy to electrical energy, interrupting the circuit. Part 4: Analysis Questions 8. Consider the device you created as a system. Is energy exchanged between your system (the device) and its surroundings? Give one example to support your statement. 9. Is matter exchanged between your system (the device) and its surroundings? Give one example to support your statement. Yes, It transfers light energy. For example, when the user cranks the flashlight, they input mechanical energy into the system. 10. Is your device an open, closed or isolated system? Explain. No, the flashlight is made into an airtight contraption so almost no air is moving around inside of the contraption. 10. Is your device an open, closed or isolated system? Explain. Closed, It doesn't exchange matter with the surroundings, but it does exchange energy in the form of mechanical energy input from you cranking it and light energy output to illuminate the surroundings. 11. What is the law of conservation of energy? The law of conservation of energy states that energy cannot be created or destroyed in an isolated system; it can only change from one form to another. 12. Describe two examples of how the law of conservation of energy is demonstrated in the device you created. 1: When you crank the flashlight (inputting mechanical energy), it's converted into electrical energy, chemical potential energy (in the battery), and eventually light energy. This demonstrates the conversion of energy from one form to another while maintaining the total energy within the system. 2: Turning off the flashlight interrupts the flow of electrical energy, but the energy is not lost; it's stored as chemical potential energy in the battery until the user turns the flashlight on again. This exemplifies how energy is conserved within the system and can be transformed and stored for later use. 13. In the lesson, an insulated container is presented as an example of an isolated energy system. Explain why this is a better example for a closed system. Because it prevents thermal energy between the contents of the container and the surroundings. While it's not entirely isolated from energy interactions (like the hand-crank flashlight), it's designed to minimize one specific form of energy exchange (heat

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version