Round
and
Round
with wheels and axles

Goingtofarawayplacesorjuststeppinginandout,easeofmotioniswhatthissimplemachineisall about.

ByGlen Phelan

Beforeyou read

Wheel and Axle

Simple  
Machines

Explorer magazine’s
six‑part series

SimpleMachines

Explorer magazine’ssix‑part series

lever
inclined plane
Wedge
screw
wheel and axle

This edition

pulley

HumanJourney

PhysicalScience

Beforeyoudothescienceactivityattheendofthisarticle,thinkabouthowyouwillrecordthe results.