Class 9 Physics | Sreeja

June

Introduction

  • Overview of topics covered

Measurement

  • Systems of units
  • SI system
  • Fundamental and derived units
  • Significant figures
  • Errors and uncertainities
  • Variation vs error
  • Systematic and random error
  • Propagation of errors

Kinematics

  • Concept of speed, velocity
  • acceleration
  • Velocity- time graphs
  • Distance-time graphs
  • Equations for uniform acceleration
  • Acceleration during free fall

July

Dynamics

  • Newton's First law
  • Mass and inertia
  • Newton's second law
  • weight and gravity
  • Gravitational field
  • Newton's third law
  • Friction
  • Static Friction, Dynamic friction

Kinetic molecular model of matter

  • Recap on different states of matter w.r.t intermolecular spacing
  • General overview on pressure and temperature
  • Molecular models of pressure and temperature
  • Brownian motion

August

Thermal expansion of solids liquids and gases

  • Molecular mechanism of expansion
  • Quantitative descriptions of expansion
  • Consequences and applications of thermal expansion

Thermometers

  • Our sense of hot and cold
  • Measuring temperature using consequences of temperature change
  • Sensitivity, range and linearity
  • Types of thermometers and their mechanisms

September

Gas laws

  • Relation between pressure and volume at constant temperature
  • Relation between pressure and temperature at constant volume
  • Relation between temperature and volume at constant pressure

October

State changes

  • Evaporation
  • Boiling
  • Melting
  • Sublimation

Latent heat

  • Molecular mechanisms
  • Temperature change during boiling and melting
  • Specific latent heat

November

Heat capacity

  • Definition
  • Internal energy
  • Equation
  • Specific heat capacity

December

Conduction

  • Conductors and insulators
  • Molecular mechanisms

January

Convection

  • Molecular mechanisms: density change
  • Factors affecting convection

Radiation

  • Infrared waves and the EM spectrum
  • Effect of surface color on absorption
  • Variation with temperature and surface area

February

Applied thermal physics

  • Refrigeration
  • Using conduction, convection and radiation

Revision

March

Revision and Exam

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