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Lesson�4:�The�Steering�Wheel
Let’s Investigate!
Working in Groups of 2-3
 • AskeachgrouptobuildtheirK’NEXcarmodel(Pages6-8
of the Building Instructions booklet). Remind the children
that there are 3 pages of building instructions for this
model. Limit their building time to 15 – 20 minutes but
ensure that all the groups have time to observe and
investigate the steering mechanism as they push their
vehicles along a desktop or the floor.
 • Toreducebuildingtime,askthechildrentodividethe
building task between them. If they are working in pairs,
for example, one pupil should build Steps 1-5 and the
other, Steps 6-10 before completing the model at Step 11.
 • Thechildrenshoulddiscussandrecordhowthe
mechanism works.
 • Thefollowingquestionsmayhelpguidetheirinvestigation.
You may find it useful to write the questions on the board
as a reference for later class discussions.
* Identify the wheel and the axle. What is their
function in the steering mechanism?
* How does the wheel and axle mechanism cause
the front wheels of the vehicle to turn?
* Is this an example of a wheel turning an axle or
an axle turning a wheel?
* Is it easier to turn the steering mechanism with, or
without, the steering wheel attached?
* The yellow steering wheel and
the blue Rod. The wheel is
turned to make the axle rotate.
* The steering wheel does not
directly turn the wheels of the
vehicle. It turns the steering
column – axle. The axle has an
orange Connector attached to it
and this pivots when the steering
wheel turns. A white Rod
connects the orange Connector
to the steering mechanism.
When the steering wheel is
turned, the steering mechanism
pivots left and right.
* A wheel is turning an axle.
* It is easier to turn with the
steering wheel attached. The
steering wheel has a larger
diameter than the axle and so
helps to increase turning forces.
Education
®
23


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