phy lab 8

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Bunker Hill Community College *

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201

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Physics

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Jan 9, 2024

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pdf

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Uploaded by ChiefIron12868

Lab Report for Lab 8 – Phy 201 WB 08/04/2023 Lab 8 Roller Coaster and Energy Purpose: To investigate energy relationships for a roller coaster car. Getting Ready: Navigate to the Roller Coaster Model in the Physics Interactives section of The Physics Classroom website: http://www.physicsclassroom.com/Physics-Interactives/Work-and-Energy/Roller-Coaster-Model Steps: Once the Interactive opens, get acquainted with how it functions. Know how to Start, Pause, Step, and Reset the simulation. Observe the three different tabs at the top of the simulation for toggling between Ramp, Loop, and Bumps. Observe that each track design can be further modified by dragging a gray circle to a different position. Experiment with the three controls for showing the Velocity vector and Force vectors and toggling Track Drag on and off. Once acquainted with the program, select the Ramp button to reset the simulation to default settings and then perform the following studies: Section 1: Basic Energy Relationships 1 Click/tap the Start button and observe the motion. View the bar charts and the velocity value as the coaster car moves. Complete the following paragraph by entering total mechanical energy (ME), kinetic energy (KE), and potential energy (PE). The labeled locations refer to the graphic at the right. As the coaster car rolls down the track from A to E, the potential energy values decrease and the kinetic energy value increases and the mechanical energy values remain constant. The potential energy is greatest at point A and smallest at point E. However, the kinetic energy is smallest at point A and largest at point E.

Section 2: Hill Design 2 Click/tap on the Bumps tab at the top of the Interactive. Then drag the gray circles to modify the track so that it looks like the track design on the right. Pay attention to the background grid to help with the design. Note that Dot G is at the same height as Dot E; make sure that the same is true of your final design. 3. Run the simulation. Does the coaster car travel as high as point H? It almost reached point H. However it did not because point H needed more mechanical energy. Since there is no external force to apply the cart can reach over the initial height which is point A. If point A was higher than point H then it would have reached it but that is not the case here. 4. How does the speed at point E compare to the speed at point G? Since points E and G are at the same height they will have the same speed. If you look above you can see that the ME, KE, and PE are identical. 5. Rank the PE for the eight locations, from the lowest PE to the highest PE. A > B < C > D < E > F < G < H 6. Rank the KE for the eight locations, from the lowest KE to the highest KE. A < B > C < D > E < F > G > H 7. Mac and Tosh are arguing about the track design. Mac claims that the car is moving fastest at point F because it is furthest along the track. Tosh disagrees, claiming that the car moves fastest at point F because point F is at the lowest height. Who do you agree with?

I agree with Tosh that the car moves the fastest at point F because it is the lowest along the track. The lowest point has the most kinetic energy but the lower potential energy making it faster. If you look above at the picture you can see the kinetic energy decreasing as point F gets higher as well as the speed. :3 8. Does changing the height of point C affect the speed of the coaster car at point D? If you look at the pictures above and look at the bottom left corner you can see that the speed of the cart is consistent regardless of the height of point c. Without friction, the speed is consistent. If there is friction then the speed will gradually slow down. The friction of the wheels on the track causes the cars to lose speed. This means that the energy they have is less and they can't get over a hill as high as they used to. So the bumps of every roller coaster must get lower and lower until the end of the ride.

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