141_Recitation02

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Michigan State University *

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141

Subject

Physics

Date

Dec 6, 2023

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docx

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Uploaded by DeanWillpowerGrouse37

CEM 141 Recitation Week 2 Recitation Roles During recitation you will work in teams of ~3 students. The roles for each team member, listed below, will rotate weekly. Member A - Team Leader: Responsible for keeping the team on track. Ensures that all members contribute equally and work together on every problem. Member B - Communicator: Responsible for writing down questions and communicating with the teaching assistant and class. Member C - Learning Coordinator: Ensures that every team member is allowed to speak and be heard. After each question, confirms that each team member understands and can explain the answer. To-Do List for Week 2  In your breakout rooms, meet your teammates if anyone was missing last week.  Turn on your cameras and microphones for easier communication!  Assign roles for the week. Remember your role since it will change weekly!  Work on the recitation week 2 activity as a team.  Work on each question together ! Do not move on until every team member understands the answer. Screen-sharing will be helpful here!  When your recitation instructor visits your breakout room, be prepared to share your screen and explain your work.  Write down any questions you have while you are working. If you are stuck, request help so your recitation instructor can visit your breakout room.  Ask questions and share responses at the end of recitation with the entire class.  Make sure that everyone on your team is prepared to discuss solutions to every question on the activity. Reminder: Make sure that every member of your team understands and can explain the solution for each question before you move on to the next question!

*** Recitation week 3 (next week) will meet in-person at the same day and time as this recitation session! Work with your recitation team to find the location of your in-person recitation. Write your recitation location here: 1. Compare gravitational and electrostatic forces. In the table below, discuss what aspects are the same and different for each of the two types of forces shown. Same for both gravitational and electrostatic Different for gravitational and electrostatic  Both have fields  Both involve 2 or more objects  Both use and involve energy  Gravitational forces involve mass and electrostatic ones involve charge  Gravitational is only attractive  Electrostatic forces are greater than Gravitational ones 2. You have an isolated system of two masses (for example, a ball and the ground). How do you think the gravitational force will change with respect to distance between the two masses? Shorter distance leads to stronger gravitational force

b. Explain in words what is happening to the potential energy as the two masses move together. Why does the potential energy change in this way? The potential energy is decreasing because it is moving with the force and being transformed into kinetic energy. c. Draw a graph to show how the potential energy of the system changes with distance between the same two masses. Be sure to label your axes. 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. PE Distance d. Since the system is isolated, what do you think will happen to the kinetic energy as the potential energy changes? It will change to maintain the total energy in the system by increasing when PE decreases and decreasing when PE increases

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