Division of City Schools Quezon City Batasan Hills National High School Lesson Plan in Grade 9 Science
Date: e!ruary 9" #$%& '(lu)inu)" *ttriu)" Chlorine+, e!ruary %$" #$%& 'Chro)iu)" Bariu)+ -nit .: orce" /otion" and 0nergy Su!unit %: orces and /otion Lesson No1 9 21 3argets: Given the necessary materials, at least 75% of the students should be able to: 1. analyze analyze and solve solve problems problems on the motion motion of a projectil projectile e launched launched at an angle from the horizontal .
221 Learning 3as4: (1 3o5ic o5ic:: rojectile !otion " rojection at an #ngle from the $orizontal Su!to5ic: &inematics '(uations on rojectile !otion B1 Conc Conce5 e5ts ts:: )eal*+orld problems on the motion of a projectile launched at an angle from the horizontal are solved using a special set of inematics e(uations. 'ach e(uation ultimately (uanti-es a particular parameter of projectile projectile motion, both its its hori horizo zont ntal al and and vert vertic ical al comp compon onen ents ts,, prov provid ided ed that that othe otherr relev elevan antt parameters are identi-ed. hese inematics inematics e(uations establish establish the the relationships relationships bet+een and among the the (uantities displacement, velocity, and time. C1 S4ill ills: projectile launched #nalyzing and solving +ord problems on the motion of a projectile at an angle from the horizontal using relevant mathematical e(uations !anipulat lating ing mathem mathemati atical cal variab variables les,, derivi deriving ng e(uati e(uations ons for proje project ctile ile !anipu motion D1 2nterdisc 2nterdisci5li i5linary nary 2ntegrat 2ntegration: ion: !athematics " students manipulate variables algebraically and use e(uations to solve projectile motion problems 01 /ater /aterial ials s Nee Neede ded: d: )ecall: golf ball, chalboard /esson roper: chalboard, problem set on projectile motion Generalization: chalboard chalboard Generalization: 'valuation: completed students0 outputs +ored solutions of the problem set2 1 6e 6efe fere renc nces es:: age % of 7
adua, #./. 3 ).!. 4risostomo. 6. ractical and 'plorational hysics : !odular #pproach. p. 58 9antos, 9 3 )4 !artin. . 9cience ;mpact: hysics. pp. <5*< http:==+++.physicsclassroom.com=class=vectors=/esson*=$orizontally* /aunched*rojectiles*roblem*9olving
2221 3eaching Strategies: (1 Daily 6outine: opening prayer, classroom cleanliness and attendance checing B1 6ecall: )ecall the conceptual bacground on the motion of a projectile launched at an angle from the horizontal, focusing on: a. constant horizontal velocity> b. changing vertical velocity through the parabolic trajectory> c. maimum height reached> d. ranged covered> and e. time of ?ight. @erify further students0 understanding and=or misconceptions by asing them to cite other real*life eamples of projectiles launched at an angle from the horizontal. C1 Lesson Pro5er: re*#ctivity
%1 ;ntroduce and give the general instructions in performing the activity to the class. #ctivity roper:
%1 ;ntroduce the inematics e(uations for the motion of a projectile launched at A from the horizontal to the class. Horizontal /otion
v x =v cos θ
8ertical /otion
v y =v sin θ initial
horizontal
velocity2
2
d y =
d x =( v x )( t t ) horizontal velocity2 t R=
age # of 7
initial vertical velocity2
( v y ) 2g
maimum height2
v y g
time to rise2
t T =
v r =√ v x + v y 2
θ= tan
−1
2
2 v y
g
total time of ?ight2
magnitude of resultant velocity2
v y v x
direction of resultant velocity2
#1 Bescribe brie?y each variable in the e(uations by referring to the follo+ing -gure.
.1 Biscuss brie?y each of the follo+ing sample problems on projectile motion. 9ample roblems: 12 # soccer ball is iced at ground level +ith a speed of m=s at an angle of <5A to the horizontal. $o+ much later does it hit the groundC 2 # long jumper leaves the ground +ith an initial velocity of 1. m=s at an angle of DA above the horizontal. Betermine the a2 time of ?ight, b2 horizontal distance=range covered, and the c2 pea height of th e lo ng jumper.
71 #s the students to solve the follo+ing problems. roblem 9et: 12 he acceleration due to gravity on the moon is 1.7 m=s . 9uppose a football player ics a football +ith an initial velocity of . m=s at 67A above the horizontal, a2 +hat maimum height +ill the football reachC b2 ho+ far +ill the football landC 2 # stone is launched from the ground into the air at an angle of 6DA to+ard the vertical bric +all that is 15. m horizontally a+ay from the launch age . of 7
point. ;f the stone taes 1.6 s to collide +ith the +all, +ith +hat speed +as the stone launchedC ost*#ctivity Biscuss the analyses and solutions of students to each of the seat+or problems given.
281
Generalization: 9ummarize the ey points covered in the lesson, focusing on the 12 strategy in solving projectile motion problems and 2 choice of the appropriate inematics e(uations2.
81
0valuation o be based on students0 activity outputs +ored solutions of the problem set=seat+or2
Pre5ared !y: /izardo, )a(uel '. Grade 8 9cience eacher, E$F$9
Chec4ed !y: !rs. )emedios . Banao $ead eacher @;, 9cience Bept. 9cience
age 7 of 7
Chec4ed !y: Br. @ioleta !. upaz 'ducation 9upervisor ;,
