M4.1 Laboratory Report 11 Worksheet

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Broward College *

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2053L

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Mechanical Engineering

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Dec 6, 2023

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Name: __________________________________________ M4.1 Laboratory Report 11 Worksheet PhET Simulation: Balancing Act Instructions You should download this page and complete all your work directly on the MS Word worksheet using MSWord, following the M4.1 Laboratory Report 11 Instructions. Submit your completed Word document to the M4.1 Laboratory Report 11 dropbox. See the Schedule and Course Rubrics in the Syllabus Module for due dates and grading information. . Learning Objectives: Describe the factors that determine whether two objects will balance each other Predict how changing the position of a mass on the balance will affect the motion of the balance Calculate torque and find an equilibrium position Use a balance to the find the masses of unknown objects Extra Challenge: Balancing Act - Game The website you need for this is Phet Simulations (University of Colorado) https://phet.colorado.edu/sims/html/balancing-act/latest/balancing-act_en.html On opening the program, click on INTRO and Explore the Balancing Act simulation with your partner(s).
Part 1 – Balancing two masses In this part of the activity, you will be placing objects at various positions to balance the seesaw. You will be told a starting mass (brick or person) and position and then will determine where a second mass should be placed in order to balance it out. To do this, you will be required to do a torque summation. The first one has been done as an example. Check your answer by placing the objects on the seesaw and removing the supports. Mass 1 (kg) Position 1 (m) τ Right = τ Left Mass 2 (kg) Position 2 (m) 20 0.5 (20)(9.8)(.5) = (5) (9.8)x x = 2.0 5 2.0 20 1.0 10 80 0.25 20 30 0.5 10 10 1.0 20 5 2.0 20
15 1.0 60 =============================================================================== Part 2 - Balancing multiple masses For this part you will be working with situations with multiple objects on the same side of the fulcrum. For example: Mass 1 (kg) Position 1 (m) Mass 2 (kg) Position 2 (m) τ Right = τ Left Mass 3 (kg) Position 3 (m) 20 1.5 m Left 30 0.50 m Left (20)(9.8)(1.5) + (30)(9.8) (0.5) = (60)(9.8)x x = 0.75 60 0.75 m Right 20 1.0 m Left 60 2.0 m Left 80 80 1.5 m Left 30 0.5 m Right 60 60 1.0 m Left 80 0.25 m Right 20 ===============================================================================
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Part 3 – Mystery Packages For this part, you will determine the masses of the mystery packages based on known objects and distances. Known Mass 1 (kg) Position 1 (m) Left τ Right = τ Left Mystery Package Position (m) Right Mass of Package (kg) 60 0.5 (60)(9.8)(0.5) = (x) (9.8)(1.5) x = 20 A 1.5 20 30 1.0 C 2.0 30 0.25 D .75 60 0.25 H 2.0 Known Mass 1 (kg) Position 1 (m) Known Mass 2 (kg) Position 2 (m) τ Right = τ Left Mystery Package Position (m) Mass of Package (kg) 20 1.75 m Left 80 0.5 m Left F 1.5 m Right 60 0.5 m Left 15 1.75 m Right E 1.25 m Right 20 0.25 m Left 5 1.0 m Left B 2.0 m Right =============================================================================== Part 4 – Balancing Act- Game: Play each level and record your best score in the boxes bellow:
Best Scor e Best Score Best Score Best Score