2 conditions for uniform motion: a) constant speed; b) constant direction (no turning). 

If either of these conditions isn't there, then the motion is "non-uniform" or "accelerated". 

Examples of uniform motion: a car in a drag race reaching and maintaining its maximum speed on a straight and flat race course; a space craft drifting between two galaxies; (very few real-life examples). 

Examples of non-uniform motion: a racing horse; merry-go-around; swing; automotive braking; throwing a softball; etc. 
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1.hands of the soldiers during marchpast ~ Uniform speed
2. Pedals of the bicycle on a straight road and a hill steep ~ Non uniform motion

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