When a human uses a complex machine it helps him or her.
The automobile. Never in history has a machine this complex been given and operated by the general public to operate and repair.
a bicycle
sewing machines and their instructions vary
Karaoke machines commonly have failures or problems which can cause them to not operate correctly. The most common problem or failure with karaoke machine is the machine having dirty or scratched cd's.
A simple machine that can produce energy without using any fuel to operate.
No. A computer is a complex machine. A simple machine is a mechanical device that uses once force to operate it, (push, pull, lift, leverage). A complex machine required many outside forces to act upon it before it can be operated.
They ran the machines, the smaller children had to climb to operate their machine
A bike is not a simple machine. It's a collection of several simple machines ... specifically, in order to even be a "bicycle" it must contain at the very minimum two simple machines (two wheels and axles).
an automatic machine works by it self without human intervention computers are automatic machine
Machines that were defunct were called back by manufacturer. Users were not able to operate those machine properly and manufacturer eventually had to call back those machines.
The Rancilio Silvia is one of the best and easiest espresso machines to use.
What is needed to operate a machine is energy.