Clock, vacum cleaner, iron.
a common machine is two simple machine use to overcome on simple task
It is a common lever.
I'm assuming that you mean what machine do locksmith's use, a very common machine used is the Protech series.
No, because it has many parts. It is a compound machine. It is just made of some simple machines.
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.
An embroidery machine.
No, because it has many parts. It is a compound machine. It is just made of some simple machines.
Lever
A pulley isn't a kind of simple machine, it is a simple machine
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.
simple machine
Its a simple machine which can crush any complex machine