What's an example of a task that requires knowledge of physical objects to perform?
To test if household batteries are still good,

What's an example of a task that requires knowledge of physical objects to perform?
how do you go down stairs?

What's an example of a task that requires knowledge of physical objects to perform?
How to make a page-holder for a book without using any addition material?

What's an example of a task that requires knowledge of physical objects to perform?
How can I hang up things on my walls without leaving marks?