Please list an application of the ken straight line linkage.

It's surprising that your teacher did not mention any application when the subject was being taught.

The linkage essentially converts rotational motion into a straight line movement. The rotational motion usually comes from a motor, and the straight line movement can be used for daily applications such as opening a door (e.g. on a bus or a train), windows, robot arms, etc.

Some very basic information can be found rapidly by googling "ken linkage".

The ken straight line linkage, also known as the Watt linkage, is a mechanical linkage that is used to convert rotational motion into approximate linear motion. One practical application of this linkage is in the suspension system of vehicles.

In a vehicle suspension, the ken linkage can be used to replicate the motion of a straight line as the suspension moves up and down. This is important because a straight line motion helps to provide a more stable and comfortable ride for the passengers by minimizing the change in height as the suspension moves.

To find more examples of the application of the ken straight line linkage in vehicle suspension systems, you can search online for technical papers or patent databases. Additionally, you can explore engineering textbooks or journals that discuss suspension design to find specific details about the linkage implementation.