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CLASS IX

ACADEMIC SESSION 2019-20

 
  • MOTION
  • FORCE & NLM
  • GRAVITATION
  • FLUID STATICS
  • WORK, POWER & ENERGY
  • SOUND
MOTION
 

ASSIGNMENT 01

MOTION

Distance and Displacement

ASSIGNMENT 04

MOTION

Average Speed & Velocity

ASSIGNMENT 07

MOTION

Acceleration

ASSIGNMENT 10

MOTION

Velocity-Time Graph

ASSIGNMENT 13

MOTION

Equations of Motion

ASSIGNMENT 16

MOTION

Equations of Motion

ASSIGNMENT 19

MOTION

Circular Motion


 

ASSIGNMENT 02

MOTION

Distance & Displacement, Speed & Velocity

ASSIGNMENT 05

MOTION

Average Speed & Velocity

ASSIGNMENT 08

MOTION

Displacement-Time Graph

ASSIGNMENT 11

MOTION

Solving Numericals by Velocity-Time Graph

ASSIGNMENT 14

MOTION

Equations of Motion

ASSIGNMENT 17

MOTION

Motion under gravity

ASSIGNMENT 20

MOTION

Relative Motion

 

ASSIGNMENT 03

MOTION

Average Speed & Velocity

ASSIGNMENT 06

MOTION

Acceleration

ASSIGNMENT 09

MOTION

Displacement-Time Graph

ASSIGNMENT 12

MOTION

Acceleration-Time Graph

ASSIGNMENT 15

MOTION

Equations of Motion

ASSIGNMENT 18

MOTION

Motion under gravity

FORCE & NLM
GRAVITATION
FLUID STATICS
WORK, POWER & ENERGY
SOUND
  • WORK, POWER & ENERGY
WORK, POWER & ENERGY
 
 

LECTURE NOTES # 01

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Lecture Content :

  • Introduction of Chapter
  • Components of Vectors
  • Work, its definition, its unit
  • Types of Work

 

LECTURE 01 : TAKE A WHILE...

Question : Is Work done by friction always negative?

Question : A force sets an object in motion. When the force is multiplied by the time of its application, we call the quantity impulse, which  changes the momentum of that object. What do we call the quantity force × distance?

Question : Give an example in which no work is done on an object while a force is always applied on it.

 

THINK A WHILE...

TAW 01 (Click here

 

PRACTICE SECTION (OLD ASSIGNMENTS)

Chapter : MOTION


        ASSIGNMENT 01 (Click here)

        ASSIGNMENT 02 (Click here)


        ASSIGNMENT 03 (Click here)                (SUBMIT YOUR ANSWERS)

        Passcode for Answer Submission : 963


        ASSIGNMENT 04 (Click here)

        ASSIGNMENT 05 (Click here)

        ASSIGNMENT 06 (Click here)

        ASSIGNMENT 07 (Click here)

        ASSIGNMENT 08 (Click here)

Chapter : FORCE AND LAWS OF MOTION

        ASSIGNMENT 09 (Click here)

        ASSIGNMENT 10 (Click here)


Science Course Structure

First Term Units Marks
I. Matter - Its Nature & Behaviour 29
II. Organisation in Living World 18
III. Motion, Force and Work 30
IV. Food; Food Production 13
Total Marks 90
Second Term Units Marks
I. Matter - Its Nature & Behaviour 18
II. Organisation in Living World 26
III. Motion, Force and Work 36
IV. Our Environment 10
Total Marks 90


First Term Units


Unit: Matter - Nature and Behaviour
Definition of matter; solid, liquid and gas; characteristics - shape, volume, density; change of state-melting (absorption of heat), freezing, evaporation (cooling by evaporation), condensation, sublimation.
Nature of matter: Elements, compounds and mixtures. Heterogenous and homogenous mixtures, colloids and suspensions.

Unit: Organization in the Living World
Cell - Basic Unit of life: Cell as a basic unit of life; prokaryotic and eukaryotic cells, multicellular organisms; cell membrane and cell wall, cell organelles; chloroplast, mitochondria, vacuoles, endoplasmic reticulum, Golgi apparatus; nucleus, chromosomes - basic structure, number. TISSUES, Organs, Organ System, Organism; Structure and functions of animal and plant tissues (four types in animals; meristematic and permanent tissues in plants).

Unit: Motion, Force and Work
Motion: Distance and displacement, velocity; uniform and non-uniform motion along a straight line; acceleration, distance-time and velocity-time graphs for uniform motion and uniformly accelerated motion, equations of motion by graphical method; elementary idea of uniform circular motion.
Force and Newton's laws: Force and motion, Newton's laws of motion, inertia of a body, inertia and mass, momentum, force and acceleration. Elementary idea of conservation of momentum, action and reaction forces.
Gravitation: Gravitation; universal law of gravitation, force of gravitation of the earth (gravity), acceleration due to gravity; mass and weight; free fall.

Unit: Food Production
Plant and animal breeding and selection for quality improvement and management; use of fertilizers, manures; protection from pests and diseases; organic farming.

Second Term Units


Unit: Matter - Nature and Behaviour
Particle nature, basic units: atoms and molecules. Law of constant proportions. Atomic and molecular masses.
Mole Concept: Relationship of mole to mass of the particles and numbers. Valency. Chemical formula of common compounds.
Structure of atom: Electrons, protons and neutrons; Isotopes and isobars.

Unit: Organization in the Living World
Biological Diversity: Diversity of plants and animals - basic issues in scientific naming, basis of classification. Hierarchy of categories / groups, Major groups of plants (salient features) (Bacteria, Thalophyta, Bryo phyta, Pteridophyta, gymnosperms and Angiosperms). Major groups of animals (salient features) (Non-chordates upto phyla and chordates upto classes).
Health and Diseases: Health and its failure. Infectious and Non-infectious diseases, their causes and manifestation. Diseases caused by microbes (Virus, Bacteria and protozoans) and their prevention, Principles of treatment and prevention. Pulse polio programmes.

Unit: Motion, Force and Work
Floatation: Thrust and pressure. Archimedes' principle, buoyancy, elementary idea of relative density.
Work, energy and power: Work done by a force, energy, power; kinetic and potential energy; law of conservation of energy.
Sound: Nature of sound and its propagation in various media, speed of sound, range of hearing in humans; ultrasound; reflection of sound; echo and SONAR. Structure of the human ear (auditory aspect only).

Unit: Our environment
Physical resources: Air, Water, Soil. Air for respiration, for combustion, for moderating temperatures; movements of air and its role in bringing rains across India. Air, water and soil pollution (brief introduction). Holes in ozone layer and the probable damages. 
Bio-geo chemical cycles in nature: Water, oxygen, carbon and nitrogen.

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