How do machines make work easier? Machines: Work is calculated by multiplying the force by the distance. There are two different kinds of machines: simple and complex machines. Simple machines include the pulley, lever and wedge, to name a few. Complex machines include two or more simple mach...
MaterialsSubstancesforuseintechnicalproducts.(These includemetals,ceramics,polymers,semiconductors, glassesandnaturalsubstanceslikewoodandstone; butgenerallyexcludefood,clothing,drugs,and relatedsubstances.) TERMSAND CONCEPTS MetalsMaterialscharacterizedbytheirhighelectricaland ...