W5a__Pre-Lab_Quizzes_2_attempts3LBBasic_Physics_Lab_II

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2/5/24, 9:44 PM W5a: Pre-Lab Quizzes (2 attempts): 3LB: Basic Physics Lab II https://canvas.eee.uci.edu/courses/61657/quizzes/312604 1/3 W5a: Pre-Lab Quizzes (2 attempts) Due Feb 9 at 11:59pm Points 1 Questions 1 Available after Feb 1 at 12am Time Limit None Allowed Attempts 2 Instructions Attempt History Attempt Time Score LATEST Attempt 2 less than 1 minute 1 out of 1 Attempt 1 38 minutes 0 out of 1 Score for this attempt: 1 out of 1 Submitted Feb 5 at 9:44pm This attempt took less than 1 minute. The weekly pre-lab is due before the beginning of your Lab session. The problem sets will be open for one week prior to the due date. Any technical problems with the website (e.g. trouble logging on) should be reported to the OIT Help Desk staff. (https://www.oit.uci.edu/helpdesk/) If you have questions about grading or mistakes in the quiz, contact your Instructor and/or TAs. NOTE: In this Quiz, you will have TWO Attempts. 1 / 1 pts Question 1

2/5/24, 9:44 PM W5a: Pre-Lab Quizzes (2 attempts): 3LB: Basic Physics Lab II https://canvas.eee.uci.edu/courses/61657/quizzes/312604 2/3 Balance of vertical forces problem. Study the setup in Figure 5.1. Three balanced forces pull on a ring that is centered over a force table. Two forces and are due to weights hanging from pulleys. A frictionless pulley changes the direction of a force without altering its magnitude. The third force is applied by a string that passes over a pulley and pulls on the force transducer. The equivalent vector diagram for this configuration is shown in Figure 5.2. EXAMPLE:

2/5/24, 9:44 PM W5a: Pre-Lab Quizzes (2 attempts): 3LB: Basic Physics Lab II https://canvas.eee.uci.edu/courses/61657/quizzes/312604 3/3 >From the balance of vertical forces, derive the expected value of θ2 in terms of m , m , and θ . [Answer: θ =sin (m sinθ /m ).] Make sure you understand how this formula was derived. Which equation is NOT used in the derivation? How to draw vector force diagrams (http://physics.wku.edu/phys201/Information/ProblemSolving/ForceDiagrams 1 2 1 2 −1 1 1 2 Correct! Correct! Quiz Score: 1 out of 1

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