Poetry uses forms and conventions to suggest differential interpretation to words, or to evoke emotive responses. Devices such as assonance, alliteration, onomatopoeia and rhythm are sometimes used to achieve musical or incantatory effects.
The average speed of an object tells you the (average) rate at which it covers distance. If a car's average speed is 65 miles per hour, this means that the car's position will change (on the average) by 65 miles each hour.
Velocity contains both the magnitude and direction components. Common speeds of moving objects. For human beings, an average walking speed is about 3 mph (~5 km/h, 1.39m/s), The speed of long distance jogging for average persons is about 6 mph (~10 km/h, 2.7 m/s).