Wksht 1

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Florida International University *

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1045

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Physics

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Apr 3, 2024

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docx

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Florida International University Name:_Angelina Vazquez Wednesday January 17, 2024 Panther ID:_6339070 Worksheet 1.4 Forces and Energy 1. You have an isolated system of two massed objects. a. Reflecting back on the example of Katie dropping the tennis ball, how do you think a gravitational force would change with respect to distance between the two massed objects (the ball and the ground)? When the ball was in her hand there was an equal force pushing up on the ball and the ball pushing down on her hand. When the ball is in the middle of falling there was the gravitational force down and no force pushing up. When the ball was on the ground the ball was pushing down just as much as the ground was pushing up. b. Explain in words what you think would happen to the potential energy as the massed objects move together. Why does the potential energy change in this way? The potential energy of the object 1 and the object stays the same if the object 1 moves in the same direction velocity and time as the object 2. Object 1 being the earth and object 2 being the ball. c. After examining the axes below, now draw a graph indicating how the potential energy of the system changes with distance between the two masses. We will define the potential energy of the two masses at a great distance (where they don't interact) as starting at the distance axis. (Hint: Where would objects at a great distance be located on your distance axis? This is the starting point.) Potential energy
Florida International University Name:_Angelina Vazquez Wednesday January 17, 2024 Panther ID:_6339070 d. Since the system is isolated, what do you think will happen to the kinetic energy as the potential energy changes? As potential energy depletes in the system kinetic energy increases. 2. Now let us think about an isolated system consisting of two oppositely charged species . a. How do you think an electrostatic force would change with respect to distance between two oppositely charged species ? (Reflect back to the electric field hockey simulation if needed) The electrostatic force would deplete in intensity as the two oppositely charged species move farther away from each other. b. Explain in words what you think would happen to the potential energy as the two opposite charged species move together. Why does the potential energy change in this way? When two oppositely charged species move closer together the potential energy would deplete as kinetic energy rises as you are currently moving the objects closer together. c. After examining the axes below, now draw a graph to show how the potential energy of the system changes with distance between the two opposite charged species . We will define the potential energy of the two charged objects at a great distance (where they don't interact) as starting at the distance axis. (Hint: Where would objects at a great distance be located on your distance axis? This is the starting point.) D i s t a n c e b e t w e e n o b j e c t s ( r ) Potential energy
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