Working Things Out: Pulleys, turbines machines — the science the models and YOU! (Crafty Inventions) 

R50.00

What inspired the Romans to build straight roads? Why did Archimedes want to make a giant screw? More tricky problems lead to another 10 brilliant inventions in this title of the Crafty Inventions series. Discover how wind was used to power machines and how printing sped up book-making. Then string up a superpulley, build a wind turbine and carve a set of vegetable printing blocks

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Working Things Out: Pulleys, turbines machines — the science the models and YOU! (Crafty Inventions)