Simple Machines
Activity Three: Other Lever Activity Three: Other Lever SystemsSystems
Essential QuestionsEssential Questions
Are all levers the same?Are all levers the same?
How does the position of the EF, RF, and How does the position of the EF, RF, and Fulcrum affect the way you use a lever?Fulcrum affect the way you use a lever?
Can levers be combined together?Can levers be combined together?
GoalsGoals
Identify the effort force, the fulcrum, and the Identify the effort force, the fulcrum, and the resistance force in a simple lever system.resistance force in a simple lever system.
Investigate the effect of changing the position of Investigate the effect of changing the position of the effort force, resistive force, and the fulcrum.the effort force, resistive force, and the fulcrum.
Collect data and draw conclusions about the Collect data and draw conclusions about the collected data.collected data.
Make observations about the effort force and the Make observations about the effort force and the effort distance relationship. effort distance relationship.
Main IdeasMain Ideas
There are There are three possible arrangements of of the fulcrum, effort force, and resistance the fulcrum, effort force, and resistance force, leading to the classification as a 1force, leading to the classification as a 1stst, , 22ndnd, or 3, or 3rdrd class lever. class lever.
VocabularyVocabulary
11stst class lever: fulcrum between the effort class lever: fulcrum between the effort force and the resistance force. force and the resistance force.
22ndnd class lever: resistance force between class lever: resistance force between the fulcrum and the effort force. the fulcrum and the effort force.
33rdrd class lever: effort force between the class lever: effort force between the fulcrum and the resistance force. fulcrum and the resistance force.
What do I do?What do I do?
Read Activity 3 ReadingRead Activity 3 Reading
Do Part A: Getting a feel for second class leversDo Part A: Getting a feel for second class levers
Do Part B: Getting a feel for third class leversDo Part B: Getting a feel for third class levers
Do Part C using Worksheets. Do Part C using Worksheets.
Do Investigation ReflectionDo Investigation Reflection
Summary of the ActivitySummary of the Activity
Appling what you learnedAppling what you learned
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