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Lesson�2:�The�Well
Whole Class
 • Discusshowthehandleofthewellisanexampleofa
wheel. The handle turns in a circle, just like the rim of a
bicycle or any other wheel with which they may be
familiar. It is like a bicycle wheel with only one spoke.
 • Talkaboutotherexampleof‘wheelsandaxles’thatthe
children may not immediately recognise. Turning these
wheels and axles usually makes something else move.
For example: a doorknob, a screwdriver, a steering wheel
and a spanner turning a nut.
Teacher’s Notes
See: A Quick Guide to Wheels and
Axles for additional information.
Extension Activity 1/Optional Activity
Working in Pairs
We would like to thank Susan Frazier and the directors of the SMILE
program at the Illinois Institute of Technology for granting us their
permission to include the following activity. ©1990. [Please visit http://www.iit.
edu/~smile/ph9005.html for further information.]
This activity allows the children to experience the forces
involved in a turning wheel and axle for themselves.
 • Inascrewdriver,thehandleisthewheelandtheshaft
that connects to the screw is the axle. It is much easier
to insert a screw with a wide handled screwdriver than
with a narrow one.
Wheel
Wheel
Axle
Axle
WHEEL: Input Force
•Smallinputforce
•Largeturningdistance
AXLE: Output Force
•Smallturningdistance
•Largeoutputforce
Education
®
15


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