Final answer:
The Scotch yoke is a mechanism that converts rotary motion into linear motion, often used in engines and machinery that require reciprocating motion.
Step-by-step explanation:
A Scotch yoke is a mechanism that transforms rotary motion into linear motion or vice versa.
It consists of a pin rotating inside a yoke, which is a slot-shaped mechanical component.
As the pin moves in a circular path owing to the rotation of the crank, it causes the Scotch yoke to move in a linear path back and forth along the line of the slot.
This mechanism is primarily used in applications where linear reciprocating motion is required, such as in piston engines, pumps, and compressors.
Moreover, a Scotch yoke can achieve this motion transformation with minimal complexity and high reliability, making it suitable for various mechanical systems.