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Kinetics

QuestionAnswer
Motion The change in position of the object over time.
Reference point (frame of reference) A fixed point used to determine if something is moving.
Relative motion Motion depends on the observer; an object can be moving for one observer and still for another.
Position The place where an object is located at a given time.
Coordinates Numbers that describe the position of a point.
Cartesian system A coordinate system with perpendicular axes (x, y) used to locate points.
Trajectory The path followed by a moving object.
Rectilinear motion Motion in a straight line.
Curvilinear motion Motion along a curved path.
Distance (travelled) The total length of the path covered by an object (scalar, no direction).
Displacement The straight-line change in position from start to end (vector, has direction).
Time interval The duration between two moments (final time – initial time).
Speed How fast something moves (distance divided by time, no direction).
Velocity Speed in a given direction (displacement divided by time).
Average velocity Total displacement divided by total time
Acceleration The rate at which velocity changes over time (can be a change in speed or direction).
Deceleration Acceleration that reduces speed (negative acceleration).
Uniform motion Motion with constant velocity (no acceleration).
Uniform Rectilinear Motion (URM) Motion in a straight line with constant velocity.
Created by: madomingo01
 

 



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