. next, let's compare the following: v {\text {tan, small}}v tan, small ​ : the tangential velocity of a point on the rim of the small cog v {\text {tan, large}}v tan, large ​ : the tangential velocity of a point on the rim of the large cog v {\text{chain}}v chain ​ : the linear velocity of a point on the chain as it moves between the small cog and large cog