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9U3C1
Motion
Term | Definition |
---|---|
motion | is an object's change in position relative to a reference point |
reference point | A place or object used for comparison to determine if an object is in motion |
distance | How far an object moves |
Displacement | the change in position of an object |
speed | the distance something travels in a certain amount of time |
scalars | are quantities that are fully described by a magnitude (or numerical value) alone |
average speed | the total distance something has traveled divided by the total time it has traveled |
constant speed | Speed that does not change |
instantaneous speed | the speed at a certain given moment |
Velocity | the speed of an object in a particular direction |
Vector | quantities that are fully described by both a magnitude and a direction |
Acceleration | the rate at which velocity changes with time |
deceleration | negative acceleration |
meters per second (m/s) | Speed is most commonly measured in |
seconds | Time is most commonly measured in |
meters | Distance is most commonly measured in |
distance/time | formula for speed |
displacement/time | formula for velocity |
scalar quantity | What type of quantity is speed? |
vector quantity | What type of quantity is velocity? |
Vfinal | Vinitial / time |
meters per second squared (m/s^2) | Acceleration is most commonly measured in |
something can accelerate by: | speeding up, slowing down, or changing direction |