Difference between KINEMATICS and DYNAMICS

Question

anonymous · Answer

http://www.physicsforums.com/showthread.php?t=54045

anonymous · Answer

by the way,
WELCOME TO OPENSTUDY!.....(:

gnemade51 · Answer

In classical mechanics (which is where I usually encounter it), "kinematics" generally refers to the study of properties of motion-- position, velocity, acceleration, etc.-- without any consideration of why those quantities have the values they do. "Dynamics" means a study of the rules governing the interactions of these particles, which allow you to determine why the quantities have the values they do.

Thus, for example, problems involving motion with constant acceleration ("A car starts from rest and accelerates at 4m/s/s. How long does it take to cover 100m?") are classified as kinematics, while problems involving forces ("A 100g mass is attached to a spring with a spring constant of 10 N/m and hangs vertically from a support. How much does the spring stretch?") are classified as "dynamics."

anonymous · Answer

in kinematics we only consider the motion and not its cause but in dynamics we consider the cause of the motion ie the forces acting on the body