what kind of stupid question is this? if the dia of the axle is larger then that of the wheels, the axle becomes the wheel and the "wheels" become the axle
It sure can. A machine as simple as a lever can produce an output force that is greater than the input force. Perhaps you are confusing "force" with "energy"?
the purpose of having a simple machine is to make life easier
because they are very important to the world and we use them everyday such as a wheel and axle that are used on doorknobs.
When the output force is greater than the input force on a simple machine, the machine provides a mechanical advantage, making it easier to perform work. This allows the machine to lift or move heavier loads than would be possible with just the input force alone.
the wheel
A simple machine with an IMA (ideal mechanical advantage) less than 1 is a machine where the output force is greater than the input force. A common example is a pulley system where the IMA is equal to the number of supporting ropes.
An airplane is not a simple machine. A lever is a simple machine. A wheel is a simple machine. Any machine that can be described by a mathematical formula is a simple machine.
A nutcracker is a lever, a type of simple machine. It consists of a rigid bar that pivots around a fixed point to help exert a greater force to crack open nuts.
You could use a simple ruler, or a micrometer for greater accuracy.
A pulley isn't a kind of simple machine, it is a simple machine
That simple machine is a lever. It allows for the turning of the wheel by applying force at a greater distance from the wheel's center, providing mechanical advantage.
simple machine