A2 1 2SimpleMachinesPracticeProblems

 A1 you 2SimpleMachinesPracticeProblems Article

ActivityВ 1. 1 ) 2В В SimpleВ MachinesВ PracticeВ

ProblemsВ

ProcedureВ В

AnswerВ theВ followingВ questionsВ regardingВ simpleВ machineВ systems. В EachВ questionВ requiresВ properВ illustrationВ andВ annotation, В includingВ labelingВ ofВ forces, В distances, В direction, В andВ unknownВ values. В IllustrationsВ shouldВ consistВ ofВ basicВ simpleВ machineВ functionalВ sketchesВ ratherВ thanВ realisticВ pictorials. В BeВ sureВ toВ documentВ allВ solutionВ stepsВ andВ properВ units. В В AllВ measuredВ valuesВ containВ threeВ (3)В significantВ digits. В В

AllВ problemВ calculationsВ shouldВ assumeВ idealВ conditionsВ andВ noВ frictionВ loss. В В

SimpleВ Machines – LeverВ

AВ firstВ classВ lever, В inВ staticВ equilibrium, В hasВ aВ 50lbВ resistanceВ forceВ andВ 15lbВ effortВ force. В TheВ lever'sВ effortВ forceВ isВ locatedВ 4В ftВ fromВ theВ fulcrum. В В

1 . SketchВ andВ annotateВ theВ leverВ systemВ describedВ above. В В

2 .

WhatВ isВ theВ actualВ mechanicalВ advantageВ ofВ theВ system? В В FormulaВ

SubstituteВ /В SolveВ

FinalВ AnswerВ

3.

UsingВ staticВ equilibriumВ calculations, В calculateВ theВ lengthВ fromВ theВ fulcrumВ toВ theВ resistanceВ force. В В

FormulaВ

SubstituteВ /В SolveВ

FinalВ AnswerВ

ProjectВ LeadВ TheВ Way, В Inc. В

CopyrightВ 2010В

POE – UnitВ 1 – LessonВ 1. 1 – ActivityВ 1. 1 . 2В SimpleВ MachinesВ PracticeВ Problems – PageВ 1В В

В 

AВ wheelВ barrowВ isВ usedВ toВ liftВ aВ 200В lbВ load. В TheВ lengthВ fromВ theВ wheelВ axleВ toВ theВ centerВ ofВ theВ loadВ isВ 2В ft. В TheВ lengthВ fromВ theВ wheelВ andВ axleВ toВ theВ effortВ isВ 5В ft. В В В

4. IllustrateВ andВ annotateВ theВ leverВ systemВ describedВ above. В В

5.

WhatВ isВ theВ idealВ mechanicalВ advantageВ ofВ theВ system? В В FormulaВ

SubstituteВ /В SolveВ

FinalВ AnswerВ

6.

UsingВ staticВ equilibriumВ calculations, В calculateВ theВ effortВ forceВ neededВ toВ overcomeВ theВ resistanceВ forceВ inВ theВ system. В В

FormulaВ

SubstituteВ /В SolveВ

FinalВ AnswerВ

AВ medicalВ technicianВ usesВ aВ pairВ ofВ fourВ inchВ longВ tweezersВ toВ removeВ aВ woodВ sliverВ fromВ aВ patient. В TheВ technicianВ isВ applyingВ 1В lbВ ofВ squeezingВ forceВ toВ theВ tweezers. В IfВ moreВ thanВ 1/5В lbВ ofВ forceВ isВ appliedВ toВ theВ sliver, В itВ willВ breakВ andВ becomeВ difficultВ toВ remove. В В

7. SketchВ andВ annotateВ theВ leverВ systemВ describedВ above. В В

8.

WhatВ isВ theВ actualВ mechanicalВ advantageВ ofВ theВ system? В В FormulaВ

SubstituteВ /В SolveВ

FinalВ AnswerВ

ProjectВ LeadВ TheВ Way, В Inc. В

CopyrightВ 2010В

POE – UnitВ 1 – LessonВ 1. 1 – ActivityВ 1. 1 . 2В SimpleВ MachinesВ PracticeВ Problems – PageВ 1В В

В 

UsingВ staticВ equilibriumВ calculations, В calculateВ howВ farВ fromВ theВ fulcrumВ theВ tweezersВ mustВ beВ heldВ toВ avoidВ damagingВ theВ sliver. В

9.

FormulaВ

SubstituteВ /В SolveВ

FinalВ AnswerВ

SimpleВ Machines – WheelВ andВ AxleВ

10.

WhatВ isВ theВ linearВ distanceВ traveledВ inВ oneВ revolutionВ ofВ aВ 36В in. В diameterВ wheel? В FormulaВ

SubstituteВ /В SolveВ

FinalВ AnswerВ

AnВ industrialВ waterВ shutoffВ valveВ isВ designedВ toВ operateВ withВ 30В lbВ ofВ effortВ force. В TheВ valveВ willВ encounterВ 200В lbВ ofВ resistanceВ forceВ appliedВ toВ aВ 1. 5В in. В diameterВ axle. В В

10.

SketchВ andВ annotateВ theВ wheelВ andВ axleВ systemВ describedВ above. В В

12.

WhatВ isВ theВ requiredВ actualВ mechanicalВ advantageВ ofВ theВ system? В В FormulaВ

SubstituteВ /В SolveВ

FinalВ AnswerВ

13.

WhatВ isВ theВ requiredВ wheelВ diameterВ toВ overcomeВ theВ resistanceВ force? В FormulaВ

SubstituteВ /В SolveВ

FinalВ AnswerВ

ProjectВ LeadВ TheВ Way, В Inc. В

CopyrightВ 2010В

POE – UnitВ 1 – LessonВ 1. 1 – ActivityВ 1. 1 . 2В SimpleВ MachinesВ PracticeВ Problems – PageВ 1В В

В 

SimpleВ Machines – PulleyВ SystemВ

AВ constructionВ crewВ liftsВ approximatelyВ 560В lbВ ofВ materialВ severalВ timesВ duringВ aВ dayВ fromВ aВ flatbedВ truckВ toВ aВ 32В ftВ rooftop. В AВ blockВ andВ tackleВ systemВ withВ 50В lbВ ofВ effortВ forceВ isВ designedВ toВ liftВ theВ materials. В В

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