Screw mechanism
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The screw is a mechanism that converts rotational motion to linear motion, and a torque to a linear force. It is one of the six classical simple machines. The most common form consists of a cylindrica
Wooden screw in ancient Roman olive press
A screw jack. When a bar is inserted in the holes at top and turned it can raise a load
Inclined plane
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An inclined plane, also known as a ramp, is a flat supporting surface tilted at an angle from the vertical direction, with one end higher than the other, used as an aid for raising or lowering a load.
Wheelchair ramp, Hotel Montescot, Chartres, France
Demonstration inclined plane used in education, Museo Galileo, Florence.
Using ramps to load a car on a truck
Loading a truck on a ship using a ramp