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Title-
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| Simple Machienes: Doing Work |
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Background-
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Force
Joule
Newton
Work
Work=Force X distance |
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Expected Outcome Of This Lesson Plan-
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Students will:
1. Understand and know how to use the formula W=Fxd
2. Understand the meaning of work
3.Understand what force is |
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Teacher Objectives-
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1.Students will demonstrate how work is being done.
2.Students will complete "Doing Work" activity sheet. |
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Resources-
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Background Knowledge of force, joule, newton, and work.
Attached Activity sheet |
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Teaching Methods-
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1. Lesson Introduction-
1.Begin a discussion by asking, "WHAT IS FORCE?" A FORCE IS A PUSH OR A PULL ON AN OBJECT.
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2. Lesson Progression-
1.Have student volunteer stand facing a wall and tell him or her to push against it. Explain that the student is exerting force on the wall.
2.Have another student volunteer stand behind his/her desk with the chair pulled out. Direct the student to slide the chair under the desk. Ask, WHAT FORCE WAS USED TO MOVE THE CHAIR? A PUSH
Ask, WHAT FORCE WOULD BE USED ON THE CHAIR IF YOU WANTED TO MOVE IT OUT FROM UNDER THE DESK AGAIN? A PULL
3.Write the terms FORCE and NEWTON on the board. Explain that FORCE is a push or pull on an object measured in units called newtons. A NEWTON is the international unit of force.
4. Ask, WHAT WAS THE DIFFERENCE BETWEEN PUSHING AGAINST THE WALL AND PUSHING AGAINST THE CHAIR? The wall did not move, the chair did.
***Write the word work on the board. Point out that WORK was accomplished when the student pushed the chair because the force that was applied to the chair caused it to move over a distance. Work was NOT accomplished when the student pushed against the wall because the wall did not move.
Work is only accomplished when an object moves as a result of a force acting upon it. If an object does not move, no matter how great the force applied to it, no work is done.
5. Write the work JOULE on the board. Explain that a joule is the unit of measurement for work. One joule of work equals 1 newton of force acting to move an object a distance of 1m.
6. Write the equation W=Fxd on the board. Explain that W stands for work, F for force, and d for distance.
Give students an example and have them calculate the amount of work done for that example. |
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3. Guided Practice-
1.Students will all demonstrate how work is done by push in their desk chair.
2.Students will demonstrate how work is NOT being done by pushing on a wall.
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4. Student Practice-
1."Doing Work" activity sheet
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5. Learner Accommodations-
1.Individual help will be given by the teacher on a need be basis.
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6. Assessment-
1."Doing Work" activity sheet
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7. Lesson Closure-
1.Students will define work.
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Measuring Student Progress-
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1. Complete review sheet for homework.
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