Use large scale pulley systems over a large, strong existing frame to lift heavy loads.
Link with the technology used in industry e.g. boat building, quarrying and agriculture.
How can you lessen the effort needed to lift a load?
Can one person lift an adult or a heavy weight?
Which pulley system is most efficient?
A variety of pulleys
Block and tackle
Large frame e.g. school gym equipment
Pulleys are available from Weymouth Museum and the Dorset and the Sea loans box