What's an example of a task that requires knowledge of physical objects to perform?
To add a surprising twist to the stuffing in a duck, you can

What's an example of a task that requires knowledge of physical objects to perform?
projector

What's an example of a task that requires knowledge of physical objects to perform?
Keep clothes clean when working on crafts.

What's an example of a task that requires knowledge of physical objects to perform?
How do you kill flies?