What are the kinematic variables and their meanings?
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Answer:
The five kinematic variables are:
Time
Position
Displacement
Velocity
Acceleration
Time: First, we can describe time both as relative or absolute. Relative time describes components of movement as a percentage of the movement time, whereas absolute is the actual time measurement (e.g. milliseconds, seconds, minutes, hours, days). While different scales of measurement can be used to describe absolute time, when using time in kinematic calculations it is important to use the SI unit of seconds (s).
Position: Position is the point in space that an object occupies, this needs to be defined in some coordinate system.
Distance : Distance is defined as the sum of the changes in position and is calculated by adding how far an object has moved in all directions.
Displacement: Shortest distance covered by the object
Acceleration is a measure of how quickly velocity is changing and is calculated as the change in velocity divided by the corresponding change in time.
Acceleration is a vector quantity meaning that it has both a magnitude and direction, and there is no scalar equivalent of this variable.
Velocity and speed are measures of how fast an object is moving. Velocity is the vector version of this quantity and speed is the scalar quantity. Velocity is the rate of change of position with respect to time.