The second chapter of Newtonian mechanics Overview
2.1 Description of particle motion
1. The position vector, the bit vector referred to: the reference point O are directed to the space segment point P
Equations of motion vector unit, the position vector expression, particle
2. The solution of the equations of motion of particles
a) eliminate the reference trajectory equation obtained
b) The t, determining the position vector at different times, find the size of the position vector, a direction (an angle into)
3. The displacement vector: describes the magnitude and direction of the mass point position variation
4. The velocity vector: describes the speed and direction of motion of the particle
a) Average speed