NCERT CLASS XI Physics Materials Part-1

UNITS AND MEASUREMENTS

• The international system of units
• Measurement of length 
• Measurement of mass 
• Measurement of time 
• Accuracy, precision of instruments and errors in measurement
• Absolute Error, Relative Error and Percentage Error
• Combination of Errors
• Significant figures
• Rules for Arithmetic Operations with Significant Figures
• Rounding off the Uncertain Digits
• Rules for Determining the Uncertaintyin the Results of Arithmatic Calculations
• Dimensions of physical quantities
• Checking the Dimensional Consistency of Equations
• Deducing Relation among the Physical Quantities
• Dimensional formulae and dimensional equations
• Dimensional analysis and its applications

MOTION IN A STRAIGHT LINE

• Position, path length and displacement 
• Average velocity and average speed 
• Instantaneous velocity and speed 
• Acceleration 
• Kinematic equations for uniformly accelerated motion 
• Free Fall
• Relative velocity

SCALARS AND VECTORS

• Scalars and vectors 
• Multiplication of vectors by real numbers 
• Addition and subtraction of vectors – graphical method 
• Resolution of vectors
• Vector addition – analytical method 
• Vector product of two vectors 

MOTION IN A PLANE

• Motion in a plane 
• Acceleration Vector
• Motion in a plane with constant acceleration
• Relative velocity in two dimensions 
• Projectile motion 
• Uniform circular motion

LAWS OF MOTION 

• Aristotle’s fallacy 
• The law of inertia 
• Newton’s first law of motion 
• Newton’s second law of motion 
• Newton’s third law of motion 
• Conservation of momentum 
• Equilibrium of a particle 
• Common forces in mechanics 
• Circular motion 
• Solving problems in mechanics

WORK, ENERGY AND POWER

• Notions of work and kinetic energy : The work-energy theorem 
• Work  
• Kinetic energy 
• Work done by a variable force 
• The work-energy theorem for a variable force 
• The concept of potential energy 
• The conservation of mechanical energy 
• The potential energy of a spring 
• Various forms of energy: the law of conservation of energy 
• Power 
• Collisions

SYSTEM OF PARTICLES AND ROTATIONAL MOTION 

• What kind of motion can a rigid body have?
• Centre of mass
• Motion of centre of mass
• Linear momentum of a system of particles
• Angular velocity and its relation with linear velocity
• Torque and Angular momentum of a particle
• Equilibrium of a rigid body and Centre Of Gravity
• Moment of inertia
• Theorems of perpendicular and parallel axes
• Kinematics of rotational motion about a fixed axis
• Dynamics of rotational motion about a fixed axis
• Angular momentum in case of rotations about a fixed axis
• Conservation of angular momentum
• Rolling motion & Kinetic Energy of Rolling Motion

GRAVITATION 

• Kepler’s laws
• Universal law of gravitation
• The gravitational constant
• Acceleration due to gravity of the earth
• Acceleration due to gravity below and above the surface of earth
• Gravitational potential energy
• Escape speed
• Earth satellite
• Energy of an orbiting satellite
• Geostationary and polar satellites
• Weightlessness