Kinematics describes how objects move.
Below are some important definitions:
Distance: Total length covered irrespective of the direction of motion of object.
Displacement: Distance an object moves in a specific direction.
Speed: Distance travelled by an object per unit time. This does not take into account the direction the object moves.
Velocity: Displacement of an object per unit time. This takes into account the direction the object moves.
Acceleration: This is the rate of change of velocity.