SCIENCE LESSON PLAN 2017-18
CLASS: 9TH STANDARD
Teacher Name :
6. Able to understand Kelvin scale and Celsius
Chapter : 1 : Matter in our surroundingsTotal periods : Date from : ___________ To : ____________Objectives :1. Students are able to understand particle nature of matter2. Classify States of matter3. Able to understand the difference in states of matter4. Differentiate Evaporation and boiling
Sl No Learning competencies Learning assisted activiies Learning AidsEvaluation Teacher’s
selfintrospectionTechnique Tool
1 ➢ Meaning of matter➢ five basic elements of
panch tatva
➢ Students are asked to collectdifferent types of matter
➢ Students are asked to perform
the activities ( refer NCERTtext book activities 1.1and1.2 ). to show matter ismade of tiny particles
Stick, Water,Saltsugar , dettolPetrol, Kerosene,Pen, nailMilk, Test tube,Measuring jar,Conicalflask, Beaker,potassium permagnet
Activity Check list
2 ➢ Characteristics of particles
of matter :1.Vacant spaces exist inparticles.2. Particles are incontinuous motion.3.Particles are held togetherby forces of attraction.
➢ Basis of Classification ofTypes : 1.Based uponparticle arrangement2.Based upon energy of
➢ Students are asked to perform
the activities (refer NCERTtext book activities 1.3and1.8 ) to know aboutcharacteristics of particles ofmatter
➢ Students perform the activities
( refer NCERT text bookactivities 1.9 and1.11 ) todifferent states of matter
Incense stick ,red inkcopper sulphate ironnail , chalk , rubberband water
pen book needle,piece of thread ,water , oil , juice ,syringe chalk
Activitiesobservation
Activitiesobservation
Observationlist
Observationlist
5.Learn and recall the factors affecting rate of evaporation
➢ 3.Based upon distancebetween particles
➢ Based on observation student
prepare a chart showingdifferences ans comparisonbetween solid liquid and gas
Chart showingdifferences betweensolid , liquid and gas
Chartpreparation
chart
3 ➢ Matter can change its state
Sublimation :a) Effect ofchange in temperatureb) Effect of Change ofPressure
➢ Latent Heat : Fusion andvapouration
➢ Evaporation & Boiling :Factors AffectingEvaporation
➢ Evaporation cause cooling.
Evaporation Vs Boiling
➢ Performing activity 1.12 to1.14 teacher will explain andshow conversation of ice intowater and water into vapour
➢ Teacher will explain themeaning of sublimation byperforming the experiment ofsublimation of ammoniumchloride
➢ Explanation of latent heat offusion and vaporization withexamples
➢ By performing the activity1.14 explaining factorsaffecting evaporation
➢ Making list of differentillustration of evaporationcausing cooling
Thermometer , glassstirrer , beaker , iceburner ,water
china dish,ammonium chloride,cotton plug ,inverted funnel,burner
Experiment
Experiment
Observationcheck list
Observationcheck list
4 ➢ Kelvin & Celsius Scale
preparing a model to demonstratemovement of particles in solid ,liquid and gas
✔ making a chart of measurable chart of measurablequantities and their units and quantities and theirsymbols units and symbols
✔ solving some problems onconverting into differentscales of temperature
Chartmaking
Chart
SUBJECT TEACHER’S SIGN PRINCIPAL’S/H.M SIGN
8.Differentiate elements and compounds .
Sl No Learning competencies Learning assisted activities Learning AidsEvaluation Teacher’s
selfintrospecti
onTechnique Tool
1 ➢ pure substance andmixtures
➢ Defination of mixture
➢ Using previous knowledge ofstudents ,questions will beasked to understand meaningof pure substance and mixture
➢ Collecting variety ofsubstance and differentiatinginto element ,compound andmixture
Iron , sea water ,milk
Observation Observationlist
2 ➢ Types of Mixture1. On the basis of theirphysical state2.On the basis of theirmiscibility
➢ Examples of different types
of mixture
➢ Activity with coppersulphate ,potassium permanganate, chalk powder orwheat flour , milk or ink ,torch and water to identify thetypes of mixture
➢ Completing the given tableby giving suitable exampleson the basis of their physicalstate .
copper sulphatepotassium permanganate, chalkpowder or wheatflour , milk or inktorch and water
Activity
completing thegiven table
Check list
Table ofdifferenttypes ofmixture
Chapter : 2 : Is matter around us pure
Total periods : Date from : ___________ To : ____________Objectives :1.Students will be able to differentiate between pure substance and mixtures2.learn about and identifying the types of mixtures based on their characteristics feature
➢ homogeneous mixtures and
heterogeneous mixtures
➢ Classifying the given mixtures
into homogeneous andheterogeneous mixture
1. Sodium chlorideand water2.Glucose and water3.Sand and water4.Air
activity Checklist
3 ➢ Concentration of Solution➢ Properties of true
solution ,colloids andsuspension
➢ Types of solution :a)on thebasis of size of soluteparticlesb) on the basis of amountofsolute
➢ Tyndall Effectc) on the basis of nature ofsolvent
➢ separation of componentsof mixtures
➢ Teacher will explain theconcentration of solution bypreparing differentconcentration of solutions
➢ Activity with copper sulphate
and mixture of milk and waterto show the Tyndall effect(refer Activity 2.3 )
➢ Preparing a chart of differenttypes of solution andcomparing the properties oftrue solution true solution ,colloids and suspension
➢ Activities (Refer Activity 2.5
to 2.12 ) will be performed toseparate the components byevaporation ,centrifugationseparating funnel ,distillation
copper sulphate andmixture of milk andwater and torch
separating funnel ,beaker , watchglass ,funnelammonium chloridesalt, kerosene.
Activity
Chartpreparation
Activity
Checklist
Chart
Checklist
SUBJECT TEACHER’S SIGN PRINCIPAL’S/H.M SIGN
Sl No Learning competencies Learning assisted activities Learning AidsEvaluation Teacher’s
selfintrospectionTechnique Tool
➢ Physical and chemicalchanges
➢ Elements and compounds
➢
➢ making list of differentexamples for physical changeand chemical change
➢ Explanation about the typesof
pure substances anddifferentiating elements andcompounds
➢ Students are asked to classify
the given material intoelement compounds andmixtures a) Sodium b) Soilc) Silicon d) Sugar solutione) Coal f) Air g) Soap h)Silver
➢ a) Sodiumb) Soilc) Silicond) Sugarsolutione) Coalf) Airg) Soaph)Silveri) Methanej) Calciumcarbonatek) Tinl) Carbondioxidem) Blood.
observationandClassification
Observationlist
4 ➢ Separation of component of
air➢ water purification system
✔ preparing the model of waterpurification system andseparation of components ofair
Sedimentationtank ,filtration tankEarthen potpebbles ,sand
Group activityChecklist
1 ➢ Law of chemical combination● Law of conservation of mass● law of constant proportion
➢ Begin the lesson by asking the
students to recall their learningof matter , atoms ,molecules,elements and compounds
➢ performing experiment (refer
activity 3.1 ) Using differentchemicals to show mass canneither created nor destroyedin chemical reaction
Black boardChalk
Cork ,thread ,conical flask , smallignition tube,solutions
Questioning
Experimentobservation
Questions
checklist
2 ➢ Dalton Atomic theory :Postulates
➢ Discussing Dalton's Atomictheory and listing postulatesofDalton's theory
➢ Students discuss how atomictheory can explainphenomenon of law ofconservation of mass and lawof constant proportion
Black boardChalk
Picture of Daltonand atomic model
Discussion Checklist
Chapter : 3 : Atoms and Molecules
Total periods : Date from : _____________ To : _____________
Objectives :
1.Define the law of chemical combination 5. Recognize the symbols of ions and name of the ion
2.List the postulates of Dalton's Atomic theory 6.Write the chemical formula of simple compounds
3.Identify the symbol of chemical Elements 7.Explain the concept of molecular mass and mole
4.Explain the concepts of atomic mass and atomicity 8.Calculate atomic mass , Unit mass and molar mass of the substance
3 ➢ Atoms , molecules andchemical symbol of elements
➢ Using PhET simulations tostudy atomic structure and todevelop the concept ofmolecule and ion
➢ Listing some of elements with
their Latin names and symbols
ComputerprojectorPhET simulationsPeriodic table
ObservationChecklist
4 ➢ Atomicity➢ meaning➢ examples
➢ Explaining the meaning ofatomicity
➢ preparing the table of elements
with formula and theiratomicity
➢ Classifying the givenmolecules into mono atomic,diatomic and triatomicmolecules
Table of differentelements withatomicity
Activity Preparedtable
5 ➢ Ion and Valency➢ Formula of simple and
molecular compounds
➢ Asking the students to find out
valency of elements by givingdifferent chemical formula
➢ Using PhET simulations toclarify the concept of cationand anion
➢ Asking students to makecation and anion by removingelectron using PhETsimulations
➢ Students will be asked to build
different molecules using
Computer projectorPhET simulationswork bookpen
Computer projectorPhET simulationswork bookpen
ObservationChecklist
6 ➢ Mole concept➢ Atomic mass
➢ Calculating Gram / molecular Class work bookmass and atomic mass by pen
Problemsolving
Problems
➢ Gram atomic mass➢ Molecular mass➢ Formula unit mass➢ Avogadro's constant
solving problems➢ Explaining the mole concept
by giving different examples➢ Explaining relation between
mole, mass and Avogadro's No
prepared table Activity preparingtable
by preparing a table of atomicmass, mole Avogadro's no /molar mass of some elements
SUBJECT TEACHER’S SIGN PRINCIPAL’S/H.M SIGN
Sl No Learning competencies Learning assisted activities Learning AidsEvaluation Teacher’s
selfintrospectionTechnique Tool
1 ➢ Introduction : Atomic model of Democratis
Atomic model Aristotle
Charged particle in matter
➢ Begin the lesson by makinguse of previous knowledge ofstudents about atoms andexplaining Democratis andAristotle model of atom asintroduction
➢ Performing activity 4.1 toknow about charged particleinatoms
Black boardChart of Democratisand Aristotle
comb ,piece of paper
Questioning
Activity
Questions
observationlist
2 ➢ Atomic model of John Dalton➢ Postulates➢ Limitations
➢ Listing the postulates ofatomic theory
➢ Discussing limitations ofDalton atomic theory
Black boardPicture of Daltonand his atomicModel
Discussion Checklist
3 ➢ Discovery of electron by J JThomson :
Cathode ray tube experiment Thomson Model of atom Conclusions
➢ showing the video of cathode
ray tube experimentexplaining Thomson model ofatom
➢ Students will be asked to listconclusions of Thomson'sExperiment
PPT / VideoChart
ObservationObservationlist
Chapter : 4 : Structure of Atom
Total periods : Date from : _____________ To : _____________
Objectives :
1.Students are able to describe the different models of atom4.Explain about Bohr's model of atom
Summary of plum puddingmodel of Atom
➢ Summarizing the plumpudding model of atom
4 ➢ Rutherford Model of an atom Discovery of new model of an
atom Gold foil experiment Conclusions Drawbacks Comparison of Atomic model
of Thomson and Rutherford
➢ Showing alpha – particlescattering experiment ofRutherford and explainingmodel of atom
➢ summarizing the postulatesof
Rutherford and drawbacks ofRutherford atomic model
➢ Asking students to comparethe atomic model of Thomsonand Rutherford
PPT / Video
Black boardchalk
Classwork bookpen
Observation
Discussion
Checklist
Checklist
5 ➢ Discovery of Proton by Eugene
Goldstein➢ Discovery of Neutron by James
Chadwick
➢ Explaining the discovery ofproton and neutron
➢ Discussing and listing theproperties of proton andneutron
Classwork bookpen
Discussion Checklist
6 ➢ Neil Bohr Atomic model postulate
Electronic configuration
➢ Explaining Neil Bohr modelof atom and listing postulates
➢ Asking students to writeElectronic configuration of 20elements
ComputerPhET simulations
Activity Worksheets
SUBJECT TEACHER’S SIGN PRINCIPAL’S/H.M SIGN
K,L,M,N Shell ➢ Distributing electrons inK,L,M ,N shell using PhETsimulations and to draw thesame in worksheets
projectorworksheet
7 ➢ Valency
➢ Atomic no and Atomic mass no
➢ Explaining the meaning ofvalency and finding valencyby giving different examples
➢ Discussing the relationbetween valency and stabilityof atom
➢ Asking student to find outatomic no and mass no
➢ listing 20 elements with their
atomic no and mass no
Black boardchalk
classwork bookpen
Discussion checklist
8 ➢ Isotopes and Isobars meaning uses
➢ Explaining the meaning ofisotopes and isobars
➢ Listing the different uses ofisotopes
Black boardchalk
classwork bookpen
Discussion checklist
9 ➢ Recapitulation ➢ Asking students to constructmodel of an atom as a groupactivity
Atomic model Activity Modelmaking
Sl No Learning competencies Learning assisted activities Learning AidsEvaluation Teacher’s
selfintrospectionTechnique Tool
1 ➢ Introduction : LivingOrganisms composed of cell
➢ Begin the lesson by drawinga
cell on blackboard andrecalling the basic conceptsrelated to cell structure by
Black boardChalk
Questioning Questions
2 ➢ Discovery of cell and itsfeatures :
1. Contribution of Robert Hooke( named cell )
2. Antonie van Leeuwenhoek (first
to see living bodies)3. Robert Brown (Study of cell)4. Purkinje (coined protoplasm)5. Schleiden and Schwann ( Plant
and animal kingdom comprisedof cell )
➢ List the events crucial to study
of cell occurring between the17 th and 20 th century
➢ Explaining the workingCompound microscope
Photos of scientists
Compoundmicroscope
Observation
Observation
Checklist
Checklist
3 ➢ Microscopic examination ofcell :
1. Unicellular and multicellularorganisms
➢ Prepare a slide with a plantcell or animal cell and observeunder the microscope
Compoundmicroscope, animalcell / plant cellslide
Observation Checklist
4.Describe the plasma membrane and its characteristics 8.Illustrate importance of cell organelles
2. Size and shape of cell ➢ Draw the image observedunder the microscope alongwith label and recordingobservation
➢ Giving examples of differentcells like amoeba , bloodcells ,neuron cell ,sperm celland explaining that shape andsize of cell depends on specificfunction they perform
water
chart showingdifferent kinds ofcells
Observation Checklist
4 ➢ Structural organization of cell✔ meaning of cell organelles✔ Plasma membrane1. Characteristics of plasma
membrane2. functions of plasma membrane3. Osmosis Hypotonic solution Isotonic solution Hypertonic solution Endomosis and exosmosis
➢ Demonstrate the process ofosmosis and diffusion with thehelp of experiments
➢ perfomimg the activity ( refer
activity 5.3) by using eggs
➢ Performing an activity ( referactivity 5.4 ) for observingosmosis with dried raisins indifferent solutions and
3 – beakers ,dil HCl , Salt , Cloth, Eggs , scale , tablespoon
Two beakers , tapwater , sugar ,raisins / Khishmish
Observation
Observation
Checklist
Checklist
5 ➢ Cell Wall1. Characteristics of cell wall2. Role of cell wall in plant cell3. Plasmolysis
➢ Performing an activity toobserve the plasmolysis inrhoeo – leaf and recording theobservations
➢ Explaining the characteristics
and role of cell wall in plantcell
Rhoeo leafmicroscopesalt solutionslide
Activity Experiment
6 ➢ Nucleus :1. structure and function of
nucleus2. Eukaryotic cell ( organised
nucleus )3. prokaryotic cell ( witout
organised nucleus )
➢ Cytoplasm :Structure and functions ofcytoplasm
➢ Performing activity to observe
nucleus in cheek cell➢ note down observation in
record book
➢ Observing the cytoplasm under
microscope and explaining
Tooth pickice – cream spoonpermanent slidecover slipwatch glassneedleblotting papermethylene blueglycerinmicroscope
Microscopeplant cellpermanent slide
Activity
Observation
Experiment
Checklist
7 ➢ Cell organelles in plant cell1. Endoplasmic reticulum2. Golgi complex3. Lysosomes4. Ribosomes5. Plastids
➢ Showing video of cellorganelles and explaining theirstructure and functions
PPT / Video Observation Checklist
SUBJECT TEACHER’S SIGN PRINCIPAL’S/H.M SIGN
8 ➢ 6.Mitochondria :Structureandfunctions
➢ Performing an experiment toobserve Mitochondria in onionpeel and recordingobservation
Janus – green Bcover slipSlideonion peelmicroscope
Activity experiment
9 ➢ 7. Vacuole :Structure and functions
➢ Performing an experiment toobserve vacuole in cactus leafand recording observations
Watch glasswaterC.S of cactus leafsafranine solutionmicroscope
Activity experiment
10 ➢ Chloroplast :Structure and function
➢ Performing an experiment toobserve Chloroplast in algaeand recording the observations
Algae , slide ,water , cover slip ,microscope
Activity experiment
11 ➢ Recapitulation : ➢ Asking students to draw andlabel the parts of plant cell byproviding worksheets
Worksheets Drawing Diagram
5.Discuss the types of animal tissues
Sl No Learning competencies Learning assisted activities Learning AidsEvaluation Teacher’s
selfintrospection
Technique Tool
1 Tissue :✔ Level of organization✔ plant and animal tissues
➢ Begin the lesson by asking the
learners to recall level oforganization and meaning ofcell and tissue
➢ Discuss connection betweencell and tissue
➢ Asking students to mentiondifferent types of cells found
Black boardchalkclasswork bookpen
QuestioningQuestions
2 ➢ Plant tissue :1. Meristematic tissue Structure and function Types of meristematic tissues
Performing theactivities to observegrowth root in onionbulb and recordingthe observations inwork sheet
Onion bulbtwo glasseswaterscale
Activity Worksheet
3 ➢ Simple permanent tissue1. Types2. Functions
➢ Observing the various simple
permanent tissues with helpofprepared permanent slideunder th compoundmicroscope or chart
Microscopepermanent slides
ObservationChecklist
Chapter : 6 : TissueTotal periods : Date from : _____________ To : _____________Objectives :1.Describe the term tissue 6. Explain epithelial tissue and its types2.Explain the meristematic tissue and its types 7.Explain connective tissue and its types3.Explain simple permanent tissues and its types 8.Describe nervous tissue .4.Explain complex tissues and its types 9. Able to draw all the plant and animal tissues
SUBJECT TEACHER’S SIGN PRINCIPAL’S/H.M SIGN
Study of stomata ➢ performing the activity (6.3)to
observe stomata undermicroscope
Leaf of RhoeoPetri dish waterSafranin
Activity Experiment
4 ➢ Complex permanent Tissue1. Xylem : Structure and function2. Phloem : structure and function
➢ Preparing a permanent slideto
observe Xylem and phloem ina stem of soft plant
➢ observing under microscope➢ Identifying the xylem and
phloem and drawing the
A stem of soft plantbladeDissection needleGlass dishSafraninCover-slipMicroscope
Activity Experiment
5 ➢ Animal tissue :1. Epithelial tissue2. Connective tissue3. Muscular tissue4. Nervous tissue
➢ Showing Chart of differentEpithelial tissues
➢ Observing drop of blood on slide and observing differentcells present in it undermicroscope
➢ Watching the video onmuscular tissue and nervoustissue
Chartmicroscope
PPT / Video
Observation
Observation
Observation
Check list
Check list
Check list
6 ➢ Recapitulation ➢ Recapitulation of whole lesson
on tissue with the help ofconcept map chart
Concept map chart Observation
5.Understand the binomial nomenclature
Sl No Learning competencies Learning assisted activitiqes
Learning AidsEvaluation Teacher’s
selfintrospection
Technique Tool
1 ➢ Introduction History of classification
Biodiversity
➢ Begin the lesson bymentioning the vast numberoforganisms that exit on ourplanet
➢ Asking learners the need ofclassifying these organisms
➢ Discussing with learners thebasis or characteristics onwhich they would classifythese organisms
➢ introduce the concept ofbiodiversity by means of
Black boardchalkchart of differentspecies
video
Questioning
discussion
observation
Questions
checklist
checklist
2 ➢ The hierarchy of classification
of groups Five kingdoms classificationsI. Kingdom – MoneraII. Kingdom – ProtistaIII. Kingdom – Fungi
➢ Activity : visit a near byecosystem (eg: field , park )and recording observationabout different organismslearners discover there whichof five kingdoms they belongto
➢ Explaining the characteristics
of kingdom Monera , protistaand fungi by showing video
Class work bookpen
video / PPT
Field visit
observation
Observationlist
checklist
Chapter : 7 : Diversity In Living OrganismsTotal periods : Date from : _____________ To : _____________Objectives :1.Students will be able to explain the need for classification2.Know the basic criteria in scientific naming3.Co-relate hierarchy and classification4.categories the major groups of plants and animals based on their characteristics feature
6 ➢ Binomial Nomenclature ➢ Introducing the learners aboutBinomial Nomenclature Learners will be as
ked to
ention the binomial
3 ➢ Kingdom plantae :I. ThallophytaII. BryophytaIII. PteriodophytaIV. GymnospermV. Angiosperm
➢ Divide the class into smallgroups .provide these groupswith image / specimen ofdifferent plants belonging todifferent class
➢ Ask each group to studycharacteristics of these plantsand classify them preparingatree structure
➢ prepare the herbarium sheeton
different mono cot and dicotplants
Plants / image ofplants belonging todifferent classes
herbarium sheetsleaves
Groupactivity
Activity
Observationlist
herbarium
4 ➢ Kingdom Animalia Classification of InvertebrateI. PoriferaII. CoelentrataIII. PlatihelminthesIV. NematodaV. AnnelidaVI.ArthropodaVII. MolluscaVIII.Echinodermata
➢ Divide the class into smallgroups , assign a phylum toeach group .Ask the group toprepare a presentation orseminar
Black boardchalkPPTprojector
Seminar Checklist
5 ➢ Protochordata➢ VertebrataI. PiscesII. AmphibiansIII. ReptiliaIV. AvesV. Mammalia
➢ Explaining the characteristics
of each class by showingvideo / PPT
➢ Preparing chart showingcharacteristics of all theclasses of vertebrates
Video / PPT
Chart
Observation
Activity
Checklist
Chartpreparation
nomenclature of plants andanimals found in theirsurroundings
Black boardchalk
chart of someplants / animals withtheir their binomialnomenclature
Observation Checklist
Observation Checklist
SUBJECT TEACHER’S SIGN PRINCIPAL’S/H.M SIGN
Evaluation QTeacher’s
Sl No Learning competencies Learning assisted activitiqes
Learning Aids selfintrospection
Technique Tool
1 ➢ Motion and its types What is movement what is rest illustrations
➢ Begin the lesson by recallingwhat students have learned inprevious class regardingmotion and time
➢ teacher will orally giveintroduction of motion andrest by giving examples ofmoving bodies and bodies instate of rest from daily life
Black boardchalk
Questioning Questions
2 ➢ Distance and Displacement➢ vector : magnitude and
direction➢ use of Odometer
➢ Performing activity 8.3 andasking students to calculatedistance and displacement
➢ Listing out examples fordistance and displacement
Class work bookpenmeter scalerope
activity checklist
Chapter : 8 : Motion
Total periods : Date from : _____________ To : _____________
Objectives :
1.Students will be able describe the concepts of motion ,distance and displacement 5.Plot the different motion graphs
2.Differentiate the uniform and nonuniform motion 6.Able to derive the equations of motion
3 ➢ Uniform and Non uniformmotion
➢ uniform and non-uniformmotion by giving examples(refer activity 8.5)
Black boardchalk
Activity checklist
4 ➢ Speed and average speed ➢ calculating speed of an object
based on distance covered byobject in given time
Black boardChalk
Problemsolving
Prqoblems
5 ➢ Velocity Concept of velocity relation of velocity with speed
and displacement
➢ calculation of velocity andaverage velocity of an objectby giving different problems
Black boardchalkClass work bookpen
problemsolving
Problems
6 ➢ Acceleration : Uniform and non – uniform
acceleration Negative and positive
acceleration
➢ List out examples for uniform
and nonuniform acceleration( refer activity 8.8)
➢ Differentiating Positiveacceleration and negativeacceleration
➢ Calculating acceleration of an
object in motion
Black boardchalkClass work bookpen
problemsolving
problems
SUBJECT TEACHER’S SIGN PRINCIPAL’S/H.M SIGN
7 ➢ Graphical representation ofmotion
➢ Distance – Time graph➢ Velocity – Time graph
➢ Plotting and interpretingmotion graph by givingdifferent examples
BlackboardchalkGraph
Graphicalrepresentation
graph
8 ➢ Equations of motion Velocity – Time eq Position – Time eq Position – Velocity eq
➢ Derive 3 – equations ofmotion
➢ Solving problems onequations of motion
Black boardchalkClass work bookpen
problemsolving
Problems
9 ➢ Uniform circular motion ➢ Clarifying concept of uniform
circular motion by givingdifferent examples
➢ Calculating speed of an object
moving in uniform circularmotion
Black boardchalkClass work bookpen
problemsolving
Problems
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