Forms Of Energy Worksheet Answers

Lesson Goals and New Content

The acceptance will accept their aboriginal appointment with the abstraction of action attention and absolute automated energy.  The ambition is for them to acquaintance how action doesn't abandon or appear, but rather is adapted from one anatomy to the other.

Procedure

Opener  (~10 min.)One way to acquaint the exercise to the acceptance is to aboriginal do a little exercise accepting them analyze the types of action of a brawl at altered stages.  Throw the brawl into the air, and draw a diagram on the board.  Again ask the acceptance to analyze the types of action of the brawl as it leaves your hand, as it alcove the aiguille of its motion, and about in between.  (Leave your diagram on the board.)  Leave the catechism accessible and changing for now; it is the active catechism abaft the lesson.  Once you accept formulated the catechism with them, alteration to the worksheet.

Development  (~25 min.)Release the acceptance into groups of 3-5 and let them assignment through the exercise.  They will alpha by bottomward a brawl and barometer the acme to which it bounces, which should alone booty a few minutes.  Afterwards that, let them assignment through the questions in the groups, while you airing about and advice them out.  In my experience, best groups should be able to accomplish it through questions a-f in the allotted time, but you can extend it as bare and let the cease backpack over to the abutting day.  Part g on the area will annul some of them, but is a advance into a altered lesson, so don't accord abroad the acknowledgment at this point.  (If it frustrates them too much, accomplish that catechism alternative and acknowledgment to it later.)

Closure  (~10 min.)Briefly go over the worksheet with the class.  You should highlight that the antecedent abeyant action of the brawl has angry into active action as it hits the ground.  Use the affected abeyant and active energies from one accumulation and ample them in on the diagram from your opener.  Then, accomplish up a cardinal in amid the two and address that as the abeyant action at your average point.  Accept the chic assumption what the active action would be.  Best of them will apparently see the arrangement and get the appropriate answer, conceivably with a little guidance.Only now will you acquaint the appellation action attention and absolute automated energy.  It is my acquaintance that textbooks accept abounding busy equations advertence action conservation, absolutely autograph out all abeyant and active action terms.  Acceptance assume to anticipate of these equations as abstracted and accepting annihilation to do with anniversary other, which confuses them and makes action attention a actual abstruse concept.  I acquisition it best instead to accent that ME=PE KE, and that MEinitial=MEfinal.  This contains the axial abstraction you appetite to bury in their minds, and they chronicle bigger to this, accepting aloof apparent it themselves in the activity.

Evaluation

In accession to the connected appraisal during the lesson, I would advance afterward up with a set of convenance problems accoutrement the basal abstraction of action conservation, for archetype as appointment for the afterward day.  The abstraction of action will additionally appear up abounding times afterwards in a physics curriculum, presenting abounding opportunities to continuously appraise the students' understanding.

Extensions

Part g on the worksheet is added advanced, and depending on how bound your chic progresses through the altered parts, you ability appetite to use it as an opener for a altered discussion.  It can be acclimated as an opener to a altercation on calefaction as a anatomy of energy.Part g contains a discrepant event: the brawl started with some bulk of energy, and we aloof assured that action is conserved; yet it ends up on the arena not affective (no abeyant or active energy).  To advance on the discussion, ask what happens back you run bottomward the stairs active your duke adjoin the railing.  The acceptance should apprehend that abrasion generates heat.  Now ask why a car agent has to accumulate working, alike back the car drives at a connected speed.  The acceptance should apprehend it is because of friction, which agency the engine's assignment generates heat.

When I did this lesson, we had already gone over assignment with the class.  A assignment bond assignment and action calm follows artlessly afterwards this one, absorption on the axial abstraction that you can add action to an article by accomplishing assignment on it.  I like accomplishing this by accepting them account the action added to a book actuality aerial a acme h at connected speed, and again comparing that to the blueprint for abeyant energy.  It builds able-bodied off this lesson, as the acceptance charge to accept action attention to acknowledge the accord amid assignment and energy.

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