Holditinplaceormoveitalong.Screwsdobothjobsallday long.

Something screwy going on

ByGlen Phelan

Screw

Simple
Machines

Explorermagazine’ssix‑part series

SimpleMachines

Explorermagazine’ssix‑part series

lever
inclined plane
Wedge
screw

This edition

wheel and axle
pulley

HumanJourney

PhysicalScience

Engineersimproveexistingtechnologies.Afteryouhavecompletedtheactivity,thinkofwaystoimprove it.