a cap is a screw as it screws onto a bottle.
What kind of simple machine is a garage door
Lever
The simple machine in this case is a wedge. The threads and cap of the screw work together to wedge two materials together.
It's a simple lever.
What kind of simple machine is a garage door
A pulley isn't a kind of simple machine, it is a simple machine
A train is not a simple machine.
wheel and axle
IT's NOT A SIMPLE MACHINE!
its not a simple machine
A pulley
lever
It is a simple lever.
Rope is not a simple machine on its own, it's a simple machine on a wheel and axle, then it's a pulley.
What kind of simple machine is a garage door
a compound machine is a combination of simple machines
Lever