Dynamics is the branch of mechanics which deals with the study of bodies in motion.

Branches of Dynamics
Dynamics is divided into two branches called kinematics and kinetics.

Kinematics is the geometry in motion. This term is used to define the motion of a particle or body without consideration of the forces causing the motion.

Kinetics is the branch of mechanics that relates the force acting on a body to its mass and acceleration.

Symbols and Notations
s = distance
x = horizontal displacement
y = vertical displacement
v = velocity
vf = final velocity
vi = initial velocity
a = acceleration
g = acceleration due to gravity
t = time