Screws

Screws book cover — Simple Machines SCREWS Authors David and Patricia Armentrout ROURKE PUBLISHING Vero Beach Florida 32964

Screws — page 1 — MACHINES Have you ever watched someone cut down a tree repair a roof or build a tree house If so you probably noticed they used tools like axes hammers and drills Imagine driving a nail without a hammer or splitting a tree trunk without an axe Those tasks would be difficult without tools That is because tools are machines Machines make our work easier

Screws — page 2 — A hammer and nails are both simple machines The force from the swing of the hammer forces the nail into the wood

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