Kinematics

Kinematics describes motion through quantities such as position, velocity, and acceleration, without explaining the forces that produce it.

Position: Position specifies an object's location relative to a chosen reference frame. Kinematics tracks how an object's location changes over time.
Uniform motion: Uniform motion maintains constant velocity over time. It is the simplest kinematic case, with zero acceleration.
Dynamics: Dynamics studies motion together with the forces and interactions that cause it. It answers the causal question that kinematics deliberately leaves open.
Motion capture: Motion capture records the movement of people or objects using sensors or imaging systems. It turns observed positions over time into kinematic measurements.
Rigid body: A rigid body is an idealized object whose internal distances remain fixed during motion. Its motion combines translation and rotation, extending point-particle descriptions.
Displacement: Displacement is the change in position from an initial point to a final point. It distinguishes net change in location from the total path traveled.
Uniformly accelerated motion: Motion with constant acceleration, for which velocity changes at a steady rate. Its equations yield position and velocity from initial conditions and elapsed time.
Newton's laws of motion: Three classical laws relating an object's motion to forces and interactions. They connect observed acceleration to its causes, extending beyond kinematic description.
Radar: Radar detects objects by transmitting radio waves and analyzing their reflected signals. Repeated range and Doppler measurements reveal an object's motion.
Continuum mechanics: Continuum mechanics models matter as continuously distributed rather than as discrete particles. It applies motion descriptions to fields of material points in solids and fluids.

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