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