A wedge. It can be argued, in fact, that a screw is not really a simple machine in itself, as it is really a wedge wrapped around an axle.
Screw
A machine screw typically has a slotted or Phillips drive whereas a cap screw typically has a socket or torx head.
A screw.
Screw
No because a screw is has a top and a winding bottom and a coil does not have a top and has a winding bottom so no a coil is not a simple machine screw.
the screw
A screw driver is an inclined plane.
No, it is not.
Yes
No
Screw jack is a non reversible machine,as it does not return to its original position even after the load is applied
Compound machines are things that are made up of 1 or more simple machines. A screw isn't made up of any simple machines unless you count the screw as a simple machine.