Bedienungsanleitung Knex 78610 - Education Intro to Levers and Pulleys Teachers Guide (Seite 44 von 62) (Englisch)

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Lesson 7: The Flagpole

Lesson�7:�The�Flagpole

A Fixed Pulley System

Time: 1 - 1.5 hours

LearningObjectives - Children should learn:

 •pulleysarewheelswithgroovesaroundtheirouterrim

 •pulleyscanbeusedtoliftobjectsandchangethe

direction of movement

 •torelatesciencetothewaysinwhichfamiliar

machines work

 •tocarryoutasimpleinvestigation

Vocabulary

pulley, wheel, groove, rim, fixed, pull,

force, lift, raise, lower, gravity, rotary,

motion, linear, load, effort, Newtons,

measurement, opposite, direction

Resources

Each group of 2-3 children

will need:

• 1 K’NEX Understanding

Mechanisms: Levers and Pulleys kit

with Building Instructions booklet

• Dot stickers or pieces of masking

tape

• Felt-tipped pens

• Measuring tape or rulers

• Coloured paper or cloth

• Coloured crayons or pencils

• Scissors

• Stapler, glue or tape

• 200g slotted weights

• 1 small bucket or basket filled with

heavy objects

• String/rope

• Broom handle

Possible Teaching and Learning Activities

Introduction

The activities in this lesson may be used to support the

QCA/DfEE Exemplar Scheme of Work for:

Design and Technology Unit

•2C:WindingUp

Science Units

•1E:PushesandPulls

    •2C:ForcesandMovement

    •6E:BalancedandUnbalancedForces

Whole Class/Demonstration:

 • Reviewwiththechildrenhowmanyofthesimple 

machines they have investigated make it easier to lift

heavy objects.

 • Askforavolunteer(s)tobend,facedown,overa 

table/desk, next to one edge, and reach down on the

side of the table/desk to lift a bucket or basket filled

with heavy objects. (Children should not extend an arm

over the front of the desk).

 • Askthevolunteertodescribehowdifficult(oreasy)

this was for them.

 • Securearopetothebucketandaskthemtopullitup

using the rope.

 • Encouragethechildrentoconsiderwaysinwhichthis

could be done more easily. For example: place a broom

handle across two desks and loop the rope over the

handle. The volunteer can now pull down on the rope

instead of pulling up. Does this arrangement make it

easier or more difficult to lift the load? Record their

suggestions/answers on the board for later reference

and discussion.

 • Explainthattheirtaskistobuildamodelthatwill 

demonstrate the use of a simple machine called a

pulley that can make the job of raising an object easier.

levers and pulleys

website: www.knexeducation.co.uk

Education

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