Lab #9 Virtual Lab Pulleys(2)

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School

New Mexico Military Institute *

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Course

2113

Subject

Mechanical Engineering

Date

Dec 6, 2023

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docx

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3

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1Virtual Lab #9 Pulleys Name____________________________#____________ http://www.compassproject.net/html5sims/pulleysim/pulley_en.html YOU MIGHT HAVE TO USE INTERNET EXPLORER Pulley System # of supporting strings F r (N) D r (m) F e (N) D e (m) MA (F r /F e ) IMA (D e /D r ) Work in (F e *D e ) Work out (F r *D r ) Single Fixed 1 5 .10 5 0.1 1 1 .5 .5 Single Fixed 1 7 .16 7 .16 1 1 .12 .12 Double Fixed 1 9 .20 9 .20 1 1 1.8 1.8 Double Fixed 1 11 .18 11 .18 1 1 1.98 1.98 Movable 1 13 .08 6.5 .16 2 2 1.04 1.04 Movable 1 15 .14 7.5 .28 2 2 2.1 2.1 Pulley System # of supporting strings F r (N) D r (m) F e (N) D e (m) MA (F r /F e ) IMA (D e /D r ) Work in (F e *D e ) Work out (F r *D r ) Single Compound 5 .18 2.5 0.36 2 1.94 0.875 0.9
1 Single Compound 1 15 .20 7.5 0.4 2 2 3 3 Double Compound 2 6 .10 1.5 0.4 4 4 0.6 0.6 Double Compound 2 8 .16 2 .64 4 4 1.28 1.28 Triple Compound 3 10 .20 1.67 1.2 5.99 6 2.004 2 Triple Compound 3 12 .18 2 1.08 6 6 2.16 2.16
1. What did you notice about the number of supporting strings and the IMA? They increase proportionally 2. When the IMA = 2, what did you notice about the effort distance (de) and the resistance distance (dr)? You created more force for more distance 3. This proved that you traded ______effort _________ for ______distance________. 4. What did the pulleys with an IMA=1 do for you? Did not provide mechanical advantage 5. If I had a pulley system that had an IMA=6 and I wanted to lift a 120 N object, how much force would I have to apply (No Friction)? If I lifted the object 1.50 m, how far would I have to pull the string? FE will be equal to 20N and the work would be 30 Joules
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