Kinematics is a branch of physics and mathematics that describes the motion of bodies, points, and systems of bodies without considering the forces that cause them to move. Kinematics includes three types of motion: free fall, projectile motion, and rotational kinematics.  In kinematics, velocity is a vector quantity that measures how fast an object changes its position within a frame of reference. It is measured in meters per second, and is calculated by dividing the change in position by the change in time. Velocity vectors are usually represented by a line segment running between points,... Show more

Kinematics is a branch of physics and mathematics that describes the motion of bodies, points, and systems of bodies without considering the forces that cause them to move.

Kinematics includes three types of motion: free fall, projectile motion, and rotational kinematics. 

In kinematics, velocity is a vector quantity that measures how fast an object changes its position within a frame of reference. It is measured in meters per second, and is calculated by dividing the change in position by the change in time. Velocity vectors are usually represented by a line segment running between points, with an arrow above the line segment to indicate the direction of movement. For example, 25 meters per second north is a velocity. 
Acceleration is the rate of change of velocity over time, and can have both negative and positive values. Negative acceleration is called deceleration. Acceleration is a vector, just like velocity and displacement. The direction of the vector of instantaneous acceleration is not always identical to the direction of the body's motion. 
Displacement is the change in position of an object, and is also a vector quantity. 

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