The word kinematics is derived from the Greek word ‘kinema’ meaning motion.
“The branch of mechanics that deals with the motion of objects without considering the forces that cause motion.”
The walking of a boy is an example of kinematics.
In kinematics, we would consider the ball’s position, velocity, and acceleration at different times during its flight, but we would not consider the forces that cause the ball to move, such as the force applied to it when it was thrown or the force of gravity acting on it.
“Dynamics refers to the branch of mechanics that deals with the motion of objects and the forces that cause the motion.”
An example of dynamics is a car moving along a road.
The car’s motion is influenced by various forces such as the engine power, gravity, air resistance, and friction between the wheels and the road
“Mechanics is the branch of physics that deals with the kinematics and dynamics of objects.”
An example of mechanics in action is the motion of a roller coaster.
Kinematics is used to describe the position, velocity, and acceleration of the coaster cars as they move along the track. On the other hand, dynamics is used to explain the forces that act on the coaster cars as they move along the track.