Don’tletaheavyloadmakeyoufrown.It’seasytoliftbypulling down.
ByGlen Phelan
SimpleMachines
Explorermagazine’ssix‑part series
SimpleMachines
Explorermagazine’ssix‑part series
This edition
HumanJourney
PhysicalScience
Asyouread,thinkaboutallthepulleysyouseeanduseevery day.