Physics XI Content

General
Question/Answer
UNIT 1 : MECHANICS
SCALAR AND VECTOR
Kinematics
Laws of Motion
Work, Energy and Power
Circular Motion
Gravity and Gravitation
Equilibrium
Simple Harmonic Motion
Angular Momentum
LAW OF CONSERVATION OF ANGULAR MOMENTUM
Elasticity
UNIT 2 : HEAT AND THERMODYNAMICS
UNIT 3 : GEOMETRICAL OPTICS
UNIT 4 : ELECTROSTATICS



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RESOLUTION OF VECTOR

RESOLUTION OF VECTOR
DEFINITION
The process of splitting a vector into various parts or components is called “RESOLUTION OF VECTOR”
These parts of a vector may act in different directions and are called “components of vector”.
We can resolve a vector into a number of components. Generally there are three components of vector viz.
Component along X-axis called x-component
Component along Y-axis called Y-component
Component along Z-axis called Z-component
Here we will discuss only two components x-component & Y-component which are perpendicular to each other.These components are called rectangular components of vector.
METHOD OF RESOLVING
A VECTOR INTO
RECTANGULAR COMPONENTS
Consider a vector  acting at a point making an angle q with positive X-axis. Vector  is
represented by a line OA. From point A draw a perpendicular AB on X-axis. Suppose OB and BA
represents two vectors. Vector OA is parallel to X-axis and vector BA is parallel to Y-axis. Magnitude
of these vectors are Vx and Vy respectively. By the method of head to tail we notice that the sum of these vectors is equal to vector . Thus, Vx and Vy are the rectangular components of vector .
Vx = Horizontal component of .
Vy = Vertical component of .
MAGNITUDE OF
HORIZONTAL COMPONENT
Consider right-angled triangle DOAB
MAGNITUDE OF
VERTICAL COMPONENT
Consider right-angled triangle DOAB
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