Pully
Power

Don’tletaheavyloadmakeyoufrown.It’seasytoliftbypulling down.

ByGlen Phelan

Beforeyou read

Pully

SimpleMachines

Explorermagazine’ssix‑part series

SimpleMachines

Explorermagazine’ssix‑part series

lever
inclined plane
Wedge
screw
wheel and axle
pulley

This edition

HumanJourney

PhysicalScience

Asyouread,thinkabouthowsimplemachineschangethedirectionofaforceandmakework easier.