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One-dimensional motion | Physics | Khan Academy. Khan Academy Physics. 28 videosLast updated on May 7, 2018.
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2018/05/07Scalar quantity is something that has magnitude only
Distance is a scalar quantity and displacement is a vector quantity
Speed is a scalar quantity
Displacement can be positive or negative
Displacement is the final position minus the initial position
Average velocity is equal to displacement over time
Instantaneous velocity
When an object is moving with constant speed
Final position is equal to initial position plus the average velocity times t
Now how can we calculate the average velocity