Final answer:
The mechanism that converts rotary motion into reciprocating motion by virtue of having its rotational center located at a distance from the rotational center of the device to which it is attached is known as the crankshaft.
Step-by-step explanation:
The mechanism that converts rotary motion into reciprocating motion by virtue of having its rotational center located at a distance from the rotational center of the device to which it is attached is known as the crankshaft. The crankshaft is an important component in the operation of a steam engine. It allows the linear motion of the piston to be transformed into rotational motion, which can then be used to do work.