It could be positive and negative; it could symbolise something that accelerates or slow down your movement.
a cog wheel is the main part that runs the cog entire body
That is a 'cog' wheel.
A simplistic answer is: A cog wheel is a circular disc that has teeth round the edge. These teeth usually mesh with the teeth of another cog. If one cog is turned, the other cog moves too. The cogs can be made from metal or plastic.
A cog is a wheel with projecting teeth. These can turn either another cog or a chain.
Wheel + thorn = cog. Have fun with the game!
A cog is a mechanism that allows the transferral of energy from one site to another. A 'cog' is a single tooth on a gear wheel.
A tooth on a wheel gear is called a cog.
You put a Wheel and a thorn
Such a wheel might be called a gear or a cog.
Wheel+thorns
wheel+thorn
cog