Skateboard=80Kg
Energy of Skateboarder
Height
Speed
Potential Energy
Kinetic Energy
Total Energy
6m
0 m/s²
4,704 Joules
0 Joules
4,704 Joules
3m
5.4 m/s²
2,352 Joules
2,352 Joules
4,704 Joules
0m
10.8 m/s²
0 Joules
4,704 Joules
4,704 Joules
II. Skate Park Lab Questions:
1. Based on the information given in the table, the skateboarder has the greatest potential energy at point A. Explain why.
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2. At which point in the image, would the skateboarder have the greatest Kinetic Energy & Why?
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3. Increase the Mass of the skater to Large by using the slider in the gray box for mass. How does the mass of the skater change the total amount of energy?
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4. If we could increase the height of the ramp to start at 12 meters. How would this affect the overall Kinetic & Potential Energy of the investigation? Explain why.
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5. Now place your skateboarder at the 6 meters mark and let the investigation play out. You can play it at Normal Speed. What happened and why?
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1. The skateboarder has the greatest potential energy at point A because it is at the highest point of the ramp. Potential energy is directly related to height, so the higher the skateboarder is, the greater their potential energy will be.
2. The skateboarder would have the greatest kinetic energy at point C. Kinetic energy is directly related to speed, so the higher the skateboarder's speed, the greater their kinetic energy will be. At point C, the skateboarder has the highest speed of 10.8 m/s², resulting in the greatest kinetic energy.
3. Increasing the mass of the skater would increase the total amount of energy. This is because both potential energy and kinetic energy are dependent on mass. Increasing the mass would increase the potential energy and the kinetic energy of the skateboarder, leading to a greater total energy.
4. Increasing the height of the ramp to start at 12 meters would increase both the overall kinetic and potential energy of the investigation. This is because potential energy is directly proportional to height, so increasing the height would increase the potential energy. Additionally, the skateboarder would gain more gravitational potential energy when starting at a higher point, which would eventually convert into kinetic energy as they go down the ramp, resulting in an increase in kinetic energy as well.
5. If I place the skateboarder at the 6 meters mark and let the investigation play out, the skateboarder would not move. This is because at the 6 meters mark, the skateboarder's speed is 0 m/s², indicating that there is no acceleration or movement. Therefore, there is no conversion of potential energy to kinetic energy, resulting in the skateboarder staying still.
6. Pause the simulation and raise the Blue Item up to 90°. What energy type is at its highest and why?
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7. Play the simulation. Describe where the Blue Item is when it has reached its highest kinetic energy and what happens to the energy of the item as it gains height again.
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8. Continue to play the simulation. This simulation will go on and on for eternity if we let it. This simulation is in what we call a Closed System. We are only looking at the variables we want to in this simulation. In the Real World (Open System), if we had a Pendulum like this, it would eventually stop. Explain why it would stop in the Real World.
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6. When the blue item is raised up to 90°, its potential energy is at its highest. This is because potential energy is directly related to height. At 90°, the blue item is at its maximum height, resulting in the highest potential energy.
7. When the simulation is played, the blue item reaches its highest kinetic energy when it is at the bottom of its swing. This is because kinetic energy is directly related to the speed of the object, and the speed of the blue item is at its maximum when it is at the lowest point of its swing. As the blue item gains height again, its kinetic energy decreases and its potential energy increases. This is because the blue item gains potential energy as it moves higher and loses kinetic energy as it slows down while moving against gravity.
8. In the real world, a pendulum like this would eventually stop swinging due to the presence of external forces such as air resistance and friction. These forces would gradually slow down the pendulum, converting its kinetic energy into other forms of energy, such as thermal energy in the case of friction. Eventually, the pendulum would come to rest as all of its mechanical energy is dissipated in the form of heat or other types of energy.
The student says that a ball dropped from a height of 3.0 meters would have less than 96 joules of kinetic energy when it hits the ground. Is she correct and why?
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She is correct because the higher the ball is dropped from, the less kinetic energy it will have when it hits the ground.
She is correct because the higher the ball is dropped from, the greater kinetic energy it will have when it hits the ground.
She is incorrect because the higher the ball is dropped from, the greater kinetic energy it will have when it hits the ground.
She is incorrect because the higher the ball is dropped from, the less kinetic energy it will have when it hits the ground.
She is incorrect because the higher the ball is dropped from, the greater kinetic energy it will have when it hits the ground. Kinetic energy is directly proportional to the height from which an object falls. As the height increases, the object gains more potential energy, which is then converted into kinetic energy as it falls. Therefore, the ball dropped from a height of 3.0 meters would have more than 96 joules of kinetic energy when it hits the ground.
The above graph is a phase change diagram for water. At points B and D the water is going through a phase change. During the phase changes, what is happening to the temperature and the heat energy?
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The temperature and the heat energy are increasing during a phase change.
The temperature remains constant and the heat energy is increasing during a phase change.
The temperature is increasing and the heat energy remains constant during a phase change.
The temperature and the heat energy remain constant during a phase change.
The temperature remains constant and the heat energy is increasing during a phase change.
Byrd has a mug of coffee at a temperature of 93°C. He sets the mug on a counter in a room with an air temperature of 25°C. What is most likely to happen to the temperature of the coffee?
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The hot coffee will transfer thermal energy into the air, and the energy transfer will continue until the coffee is at room temperature.
The air will transfer thermal energy into the coffee, and the energy transfer will continue until the coffee is at room temperature.
The hot coffee will transfer thermal energy into the air and will continue to transfer energy until they are both 93℃.
The air will transfer thermal energy into the coffee and will continue to transfer energy until they are both 93℃.
The hot coffee will transfer thermal energy into the air, and the energy transfer will continue until the coffee is at room temperature.
Title: Investigating Heat Transfer: Comparing the Insulating Properties of Different Materials
Introduction: Heat transfer is an essential concept in understanding how energy moves from one object to another. In this investigation, we focused on exploring the insulating properties of different materials. Understanding which materials can effectively reduce heat transfer is crucial in various real-world applications, such as building construction and energy conservation. This experiment aims to compare the effectiveness of different materials in minimizing heat transfer through conduction.
Methods: To examine the insulating properties of various materials, we set up a simple heat transfer model. We used three identical size containers, each filled with hot water. Each container is made up of different materials. One will be aluminum, one styrofoam, and the other paper. One container served as the control and was made of ceramic. We measured the initial temperature of the water and recorded the temperature every five minutes for one hour.
Results: The experimental results clearly demonstrated the varying abilities of different materials to reduce heat transfer through avoiding conduction, thus being a good insulator. The container made of aluminum exhibited the greatest temperature change over time, indicating it's not a great insulator. On the other hand, the container made of paper showed a significant temperature drop compared to the control, but it was more effective than aluminum. The container made of Styrofoam showed the least change in temperature over time and shows it would be the best insulator. These findings can be utilized in real-world scenarios, such as selecting appropriate insulation materials for buildings or designing thermal clothing. By understanding the concept of heat transfer and the effectiveness of different insulating materials, we can make informed choices to conserve energy and enhance comfort in our daily lives.
13. How does the type of material used as an insulator affect heat transfer? Use evidence to support you from the text given.
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14. How does the movement of particles within a substance contribute to heat transfer?
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15. If you were to build a home that effectively kept the cool air in during the summers and the hot air in during the winters, what materials would you choose and why?
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