Class 11 Physics Important Derivations (1)

Page 1: Units & Measurement

• Significant Figures

  • Questions related to significant figures may appear in the exam.

  • Importance of identifying significant digits.

  • Multiple choice questions on the derivation of formulas, checking correctness, and conversions between measurement systems.

  • Only the same type of quantities can be added or subtracted.

• Key Areas of Focus

  • Derivation of the formula.

  • Checking the correctness of the formula.

  • Important questions on Units & Measurement provided by Sciphy.

Page 2: Kinematics

• Motion in a Straight Line

  • Important topics include derivation of equations and graphical methods of motion.

  • Understanding velocity-time and position-time graphs is crucial:

    • The slope of the graph indicates velocity.

    • Nature of graphs such as position-time graph.

• Important Concepts

  • Average velocity, instantaneous velocity, average speed, and speed.

  • Numerical problems related to these topics are significant for the exam.

Page 3: Motion in a Plane

• Key Concepts

  • Laws of vector addition are critical:

    • Parallelogram law and analytical treatment of vector addition.

  • Resolution of vectors:

    • Practical examples such as pulling versus pushing a lawn roller.

• Numeric Problems

  • Important numericals on cross product, dot product, and results related to vectors.

  • Derivations and numericals related to horizontal and angular projectile motion.

  • Grasp uniform circular motion and centripetal acceleration concepts.

Page 4: Laws of Motion

• Newton's Second Law

  • Focus on impulse-momentum theorem, particularly calculations involving average force versus time.

• Other Important Topics

  • Applications of inertia (e.g., why passengers lean forward in a bus when it stops suddenly).

  • Numerical assignments related to equilibrium of concurrent forces and motion of connected bodies.

  • Conservation of momentum is essential, including examples and applications.

Page 5: Work, Energy & Power

• Key Concepts

  • Important derivations related to work-energy theorem and elastic vs. inelastic collisions.

  • Understand conservative nature of potential energy and conservation of mechanical energy.

• Numerical Importance

  • Motion along vertical paths and relationships between kinetic energy and linear momentum are significant.

Page 6: Rotational Motion

• Key Topics

  • Concept of angular momentum and important equations associated with it.

  • Numerical problems related to the velocity of the center of mass.

• Topic Importance

  • Understanding rotational motion and related derivations are 70% critical.

Page 7: Gravitational Physics

• Key Areas

  • Variations in gravitational acceleration with height are crucial for both theoretical and numerical problems.

  • Escape speed, orbital speed, and Kepler's laws are topics of focus.

Page 8: Properties of Solids

• Key Topics

  • Conceptual questions on stress, strain, and the basics of physical properties of solids.

  • Related numerical problems and MCQs are important for understanding material properties.

Page 9: Mechanical Properties of Fluids

• Key Topics

  • Understand Bernoulli's theorem and applications.

  • Pascal's law and its implications in fluid mechanics.

Page 10: Thermal Properties of Matter

• Focus Areas

  • Numerical problems related to thermo-properties and Stefan's law.

  • Key theoretical concepts such as the first law of thermodynamics.

Page 11: Kinetic Theory

• Key Topics

  • Understanding pressure, its derivation through kinetic theory, and specific heat capacities of various gases.

  • Important numericals concerning kinetic energy and molecular behavior of gases.

Page 12: Oscillations and Waves

• Key Concepts

  • Energy in simple harmonic motion, derivations for pendulum time period, and wave properties.

  • Fundamental concepts of standing waves in strings and various harmonic modes.