The
Analysis of Rectilinear Motion
In
Grade X’s physics book, it has been defined the rectilinear motion, which is a
motion in a straight line path. In its motion, a particle will always change
its position. A particle in motion will always have velocity, and probably acceleration
as well. How is relationship between the displacement, velocity and
acceleration?
Position
of A Particle in A Plane or in Space
In
a coordinate system, the position of a particle is represented by position
vector. To understand position vector, we have to first learn the notion of
unit vector.
Unit
vector
A unit
vector is a vector which magnitude is one, without unit, and which direction is
along the coordinate axes. For the Cartesian coordinate system, these unit
vector the direction of along the x, y and z axes.
In
a Cartesian coordinate system, the unit vector are represented by i, j and k;
each in the direction of the x, y and z axes resprectively.
 |
| A three dimensional coordinate |
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