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| 183_projects:problem7a_fall2024 [2024/08/13 17:04] – hallstein | 183_projects:problem7a_fall2024 [2025/02/24 22:43] (current) – hallstein | ||
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| + | ==== Kick Off Questions ==== | ||
| + | The energy principle for a system states the change in energy of the system can be found in terms of work done and heat: | ||
| + | $$\Delta E_{sys} = W_{surr} + Q$$ | ||
| + | - What do $W_{surr}$ and $Q$ mean as they relate to the system? | ||
| + | - The heat can be positive, negative or zero. What do each of these mean in terms of the direction of its flow? | ||
| + | - The work done by a force is related to the force and the displacement. It can be calculated via the scalar or dot product. What are the conditions for the force and displacement that can result in positive work? Negative work? Zero work? | ||
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| ==== Project 7: Energy and Avengers==== | ==== Project 7: Energy and Avengers==== | ||
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| * Is work done on the system? Is it positive or negative? How do you know? | * Is work done on the system? Is it positive or negative? How do you know? | ||
| * Draw the energy bar charts for the scenario. | * Draw the energy bar charts for the scenario. | ||
| - | * Draw an energy vs time graph showing all energies, including the total system energy. | + | * Draw an energy vs time graph showing all mechanical |
| 2. Pick a system to calculate how fast the train will going when it gets to the station. | 2. Pick a system to calculate how fast the train will going when it gets to the station. | ||
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| * Is work done on the system? Is it positive or negative? How do you know? | * Is work done on the system? Is it positive or negative? How do you know? | ||
| * Draw the energy bar charts for the scenario. | * Draw the energy bar charts for the scenario. | ||
| - | * Draw an energy vs time graph showing all energies, including the total system energy. | + | * Draw an energy vs time graph showing all mechanical |
| 2. Pick a system to calculate the maximum height that the arrow will reach in the sky. | 2. Pick a system to calculate the maximum height that the arrow will reach in the sky. | ||
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| * Is work done on the system? Is it positive or negative? How do you know? | * Is work done on the system? Is it positive or negative? How do you know? | ||
| * Draw the energy bar charts for the scenario. | * Draw the energy bar charts for the scenario. | ||
| - | * Draw an energy vs time graph showing all energies, including the total system energy. | + | * Draw an energy vs time graph showing all mechanical |
| 2. Spiderman decides to shoot a web to try to catch the apple before it hits a person on | 2. Spiderman decides to shoot a web to try to catch the apple before it hits a person on | ||
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| + | /* | ||
| ===== Scenario 7d: Captain Marvel lowers the Infinity Gauntlet ===== | ===== Scenario 7d: Captain Marvel lowers the Infinity Gauntlet ===== | ||
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| * Is work done on the system? Is it positive or negative? How do you know? | * Is work done on the system? Is it positive or negative? How do you know? | ||
| * Draw the energy bar charts for the scenario. | * Draw the energy bar charts for the scenario. | ||
| - | * Draw an energy vs time graph showing all energies, including the total system energy. | + | * Draw an energy vs time graph showing all mechanical |
| 2. When Captain Marvel lowers the infinity gauntlet, how much work does she do? | 2. When Captain Marvel lowers the infinity gauntlet, how much work does she do? | ||
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| Black Widow unfortunately finds the Hulk trapped in a net by the ceiling at a height of 12 meters, which is tied to an anchor on the floor. Black Widow wants to rescue the Hulk but doesn' | Black Widow unfortunately finds the Hulk trapped in a net by the ceiling at a height of 12 meters, which is tied to an anchor on the floor. Black Widow wants to rescue the Hulk but doesn' | ||
| - | */ | + | |
| - | /* | + | |
| ====== Project 7f: The Black Widow ====== | ====== Project 7f: The Black Widow ====== | ||
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| Make sure to indicate what your system is and to draw energy bar charts for the different parts of The Black Widows journey. | Make sure to indicate what your system is and to draw energy bar charts for the different parts of The Black Widows journey. | ||
| + | */ | ||