a lever and a inclined plane
lever and a wedge
A wheel and axle and a lever
There is 6 simple machine theres screw,lever,pulley,wedge,fulcrum,inclined plane thats all
1.Wheel and axle 2.Screw 3.Lever
That isn't a simple machine, it is a complex machine, made up of other simple machines.
An inclined plane is a type of simple machine that makes it easier to move object up or downhill.
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.
You could use a ramp as a simple machine to move the piano up the stairs. By tilting the ramp against the stairs at a gentle angle, you can roll the piano up the ramp instead of lifting it directly. This reduces the force needed to move the piano and makes it easier to transport up the stairs.
Complex machine
a pulley
compound machine
compound machine