Reciprocating rectilinear motion gives the slow advance and quick return of a bar, as shown in the video above. A pin in a rotating disk changes position in a slotted arm causing this motion. A single reciprocation cycle is called a stroke. This type of mechanism converts circular motion to linear motion. This type of motion was used in early steam engines, propelling the vehicle.
The fact that this type of motion converts to another type of motion which is able to do a different type of work is very interesting. The angular displacement, velocity, and accelerations become linear displacement, velocity, and acceleration. This type of motion can be caused by a crank, gears, or other simple mechanisms.
I chose this mechanism to write about as well! I agree with you that the simplicity of this mechanism and the ingenuity of its construction are what make it so interesting.
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