in the toiler tank
Whether or not a mill is an example of a wheel and axle is a matter of semantics. It certainly would contain examples of a wheel and axle.
A wheel barrow is one example
a complex machine would be a car, but a simple machine would be a wheel and axle. an example of a wheel and axle would be a steering wheel
You could say a bike wheel is a wheel and axle. Also a doorknob is a wheel and axle.
Wheel and axle
Can opener
a doorknob
A tire
A cycle
yes of course
No, a pencil is an object used to apply carbon lead to writing materials.
Transportation would be a use of the wheel and axle.