Answer:
speed = distance/time
velocity is speed together with the direction of movement
Explanation:
Every speed limit sign tells you ...
speed = miles/hour
Of course, the units can vary, but the general form is ...
speed = distance/time
where "distance" is the magnitude of the displacement in the associated time period.
For example, if you travel 30 miles in 45 minutes, your speed in miles per hour is ...
speed = (30 mi)/(3/4 h) = 30·4/3 mi/h = 40 mi/h
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Velocity is a vector quantity, so has both magnitude (speed) and direction. It might be defined as ...
velocity = displacement/time
where displacement is a vector quantity.
For example, if you travel 30 miles east and 40 miles north in 1 hour, your average velocity is
velocity = (30, 40)/1 = (30, 40) mi/h . . . . . in (east, north) coordinates
= 50∠36.87° mi/h . . . . . in "polar" coordinates with the angle being a bearing angle measured clockwise from north
