Name of the Practice Teacher: Joebert A. Palma Palma Jr. Jr. Year Year and Section: Section: Grade 9, Diamond, Gold, and Pearl Subject and Time: Physics, 9:45 – 10:45, 10:45 – 11:45, and 3:00 – 4:00 Date(s): 1 !ebr"ary #01$ Name of the Critic Teacher: %s &'elyn (. )arrosa A )emi*Detailed +esson Plan in Grade 9 Physics 9:45 A% – 11:45 A% 3:00 P% – 4:00 P% -.
b/ecti'es: At the end o the lesson, the st"dents sho"ld be able to: a de2ne de2ne the the ter term m or or b calc"l calc"late ate the or or done by a orce, orce, and oer oer "sed in doin6 doin6 or in 'ario"s sit"ations c descri describe be hat hat oe oerr is, and d cite the the imortance imortance o o "nderstandin "nderstandin6 6 or and oer oer
--. )"b/ec )"b/ectt %atte %atter: r: 78or 78or and Poer oer ---. ---. -nstr" -nstr"cti ctiona onall %aterial %aterials s A. A"dio*(i A"dio*(is"al s"al Aid: %anila %anila aer, 'ideo 'ideo resentatio resentation n . ;eer eeren ence ces s 1. Pad"a, ad"a, A. < =ris =risos osto tomo mo,, ;. >#01 >#010 0.. Practical and explorational physics: modular approach. ?"e@on: ?"e@on: (ib (ibal al P"blishi P"blishin6 n6 o"se, o"se, -nc. #. Ba'e, =. >#01$. HyperPhysics: kinetic energy. energy. Geor6ia )tate Cni'ersity. ;etrie'ed, !ebr"ary #01$, rom htt:hyerhysics.hy*astr htt:hyerhysics.hy *astr.6s".ed"hbasee.html .6s".ed"hbasee.html 3. Ehe Ehe Physi hysic cs =lassr assroo oom m. >#0 >#01$. Work, Work, energy energy,, and power: power: mecha mechanic nical al energy energy . ;etrie'ed, !ebr"ary ary #01$, rom htt:.hysicsclassroom.co htt:.hysicsclassroom.comclassener6y mclassener6ylesson* lesson* 1%echanical*&ner6y -(. -(. Proce roced"r d"re e A. ;o"ti o"tine ne *Ehe teacher ass the class to ray and then checs the attendance ater. *)t"dents are ased to arran6e their chairs roerly and to ic " ieces o aer. . %oti %oti'a 'ati tion on *Ehe teacher shos a 'ideo resentation abo"t inetic and otential ener ener6i 6ies es to the the clas class s as a mean means s o ro' ro'id idin in6 6 the the st"d st"den ents ts rio riorr noled6e abo"t the toic. *Ater the resentation, the teacher ass the st"dents F"estions that ill lead to the toic. ?"estions: =an =an yo" yo" desc descri ribe be ine ineti tic c ener ener6y 6y o o abo" abo"tt oten otenti tial al ener6y 8hat acti'ities sho inetic and otential ener6ies 8hat do yo" thin is o"r toic or today =. +esso +esson n Pro Proe err *Ehe ob/ecti'es are resented to the class. a. Acti'i ti'itty *Ehe teacher shos a tray ith sand inside to the class. e then ass to 'ol"nteers in ront. 1
*Ehe teacher hands a marble to the one 'ol"nteer, and a tennis ball to the other. e instr"cts the to st"dents to dro the balls sim"ltaneo"sly to the tray o sand and to narrate to the class hat haened and share their obser'ations. *Ehe teacher then instr"cts one st"dent to dro the tennis ball at diHerent hei6hts and then to obser'e hat ill haen. b. Analysis *Ater the acti'ity, the teacher ass 6ro" members se'eral F"estions abo"t the acti'ity. ?"estions: 8hat did yo" obser'e on the sand ater droin6 the marble o abo"t ater droin6 the tennis ball 8hich o the to had a deeer crater 8hy do yo" thin the tennis ball had deeer crater Ater droin6 the tennis ball at diHerent hei6hts, at hich hei6ht did the tennis ball had deeer crater 8hy do yo" thin that haened c. Abstraction *Ehe teacher resents the concet o mechanical ener6y to the class by oenin6 the toic abo"t inetic and otential ener6ies. Ater hich, he ass st"dents to describe otential ener6y and inetic ener6y based on the acti'ity resented earlier. *Gra'itational otential ener6y is disc"ssed by the teacher, describin6 it as the ener6y an ob/ect has in relation to its ei6ht and relati'e hei6ht. e inorms the st"dents that the "nit or ener6y is /o"les J hich is eF"al to N ∙ m . PEg =W = F ∙ d = mgh
*Ehe teacher "ses the acti'ity earlier as an eIamle to 6ra'itational otential ener6y. e eIlains that the hi6her the distance rom the relati'e @ero hei6ht, the hi6her the 6ra'itational otential ener6y. Ehe teacher assi6ns 'al"es or the diHerent hei6ht o the tennis ball, and then "ses the orm"la to sol'e or the otential ener6y o the to balls at diHerent hei6ht. *inetic ener6y is disc"ssed by the teacher to the class, describin6 it as the ener6y in motion. Ehereore it deends on the mass and seed o a mo'in6 ob/ect. Ehe orm"la or inetic ener6y is also disc"ssed by eItractin6 it rom BetonKs second la o motion and the orm"la or constant acceleration F net =ma - net orce is constant, then the acceleration is also constant 2
a=
v f
− vi
2
2d
(
2
v f − v i F net =m 2d
2
)
)imliyin6, e 6et 1
2
F ∙ d = m v f 2
−
1 2
mv i
2
#
ence F ∙ d W KEf KEi =
=
−
or Work-Ener! Theorem
8here 1
KE= m v
2
2
*=onser'ation o ener6y is resented to the class by tossin6 the tennis ball in the air. Ehe teacher narrates that the stored chemical ener6y in the body is transerred to the ball as inetic ener6y. As the ball reaches the maIim"m hei6ht, the inetic ener6y is con'erted to otential ener6y, b"t then immediately con'erted bac to inetic ener6y as the ball alls. Ehe teacher eIlains that the s"m inetic and otential ener6y is called mechanical ener6y. *Ehe teacher then ass the st"dents to state the la o conser'ation o ener6y in analo6y to the tossin6 o ball. d. Alication *Ehe teacher resents samle roblems in'ol'in6 otential ener6y and inetic ener6y. Ehe teacher ansers the roblems hile disc"ssin6 each art o the orm"las. *Ater the resentation o the orm"las and samle roblems, the teacher resents se'eral roblems to the class or the airs to anser. Problems: 1. An ob/ect has a mass o 3 6. =alc"late its otential ener6y 3 m abo'e the 6ro"nd. #. A #0*6 boI alls rom a brid6e and lands in the ater #0 m belo. !ind its >a initial P&, >b maIim"m &, and >c 'elocity "on reachin6 the ater. D. (al"es -nte6ration *Ehe teacher ass the st"dents o hat is the imortance o mechanical ener6y in real*lie sit"ations. ?"estions: 8hat is the imortance o "nderstandin6 otential and inetic ener6y 8hat are the ractical alications o mechanical ener6y o do e harness electricity in hydroelectric oer lants &. &'al"ation *A roblem is resented to the class. Ehe st"dents are ased to anser the roblem in airs in a one*hal sheet o aer. Problem: 8 3 1. -n the 9Lm*hi6h %aria =ristina !alls, 1.3 × 10 cm o ater Mos e'ery second. -
3
1 cm
of water is equal ¿ 1 g , 2nd the >a
initial P& o the ater Mo, >b maIim"m &, and >c 'elocity "on reachin6 the t"rbines o the oer lant on the 6ro"nd. (. Assi6nment A. 8hat to do: !ind hat is ased in the roblem: A 0.$#5 )aldin6 basetball as droed rom the basetball rin6 at a 3
hei6ht o 3.04L m. !ind the >1a initial P& o the ball, >1b maIim"m &, and >1c 'elocity "on reachin6 the Moor. - )tehen ="rry recei'es the ball 1.91 m abo'e the 6ro"nd, hat is the >#a initial P&, >#b maIim"m &, and >#c 'elocity o the ball rom the distance beteen the basetball rin6 and )tehen ="rryKs hands . 8here to rite: ne*hal sheet o aer =. 8hen to ass: 11 !ebr"ary #01$ D. B"mber o oints: 30 oints (-. )trate6ies Csed %oti'ation +esson Proer a Gro" disc"ssion b +ect"rette c (al"es inte6ration
(ideo resentation Gro" disc"ssions and 7all Dro acti'ity Presentation ?
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