Basic machines and how they work starts with explaining the classical simple machines lever inclined plane pully and its relation to the lever compound pully and screw and its relation to the inclined plane. Basic machines and how they work webpalorg. Basic machines axle the block and tackle and gears may be considered levers the welge and the screw use the principle of the inclined plane when you are familiar with the principles of these simple machines you can readily understand the operation of complex machines. Basic machines and how they work starts with explaining the classical simple machines lever inclined plane pully and its relation to the lever compound pully and screw and its relation to the inclined plane