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Session 2. Mechanisms. Movement in Design and Technology. Structures and forces Levers and linkages Types of motion. Structures and forces on them. Forces can squash, stretch and twist things Forces can hold things still or keep things moving

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Session 2


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session 2

Session 2

Mechanisms

Design and Technology PGCE

movement in design and technology
Movement in Design and Technology
  • Structures and forces
  • Levers and linkages
  • Types of motion

Design and Technology PGCE

structures and forces on them
Structures and forces on them
  • Forces can squash, stretch and twist things
  • Forces can hold things still or keep things moving
  • Forces can make things move faster, slow them down or change their direction

Design and Technology PGCE

examples of forces
Examples of forces
  • Earth’s Gravity
  • Friction
  • Buoyancy in water
  • Air resistance
  • Moving air or water
  • Pushing and pulling
  • Magnets

Design and Technology PGCE

levers and linkages
Levers and Linkages
  • A lever is a rigid shape which is able to turn around a pivot. The position of the pivot determines the type of lever and the effect obtained by moving it.
  • A linkage connects levers and other moving parts and transmits movement from one part of a mechanism to another.

Design and Technology PGCE

levers
Levers

GIVE ME A PLACE TO STAND AND I WILL MOVE THE EARTH

Archimedes Engraving from the Mechanics Magazine, London, 1824

Design and Technology PGCE

types of levers
Types of levers

There are three basic types:

  • First Class lever
  • Second Class Lever
  • Third Class Lever

www.enchantedlearning.co.uk

Design and Technology PGCE

levers1
Levers
  • In a first class lever the pivot or fulcrum is is between the effort and the load
  • Second class levers always have their load in between the fulcrum and the effort
  • Third class levers have the effort in between the fulcrum and the load

Design and Technology PGCE

task 1
Task 1

Create a classroom resource that uses levers or linkages *

Design and Technology PGCE

slide10

http://ngfl.northumberland.gov.uk/dt/mechanisms/lever%20linkage.htmlhttp://ngfl.northumberland.gov.uk/dt/mechanisms/lever%20linkage.html

Design and Technology Foundation Course

mechanisms and machines
Mechanisms and machines
  • A mechanism is used to convert between one type of motion and another
  • A machine is a group of interconnected mechanisms which convert one type of motion into a variety of other motions

Design and Technology Foundation Course

progression through mechanisms
Progression through mechanisms
  • Wheel
  • A water wheel
  • A water wheel driving a machine

Design and Technology Foundation Course

types of mechanisms
Types of Mechanisms

Some types you may find useful:

  • Levers
  • Linkages
  • Chains and gears
  • Piston
  • Pulley
  • Wheel

Design and Technology Foundation Course

types of motion
Types of Motion
  • Linear
  • Reciprocating
  • Rotary
  • Oscillating
  • Intermittent
  • Irregular www.flyingpig.co.uk

Design and Technology PGCE

concept progression
Concept Progression

The children’s ideas and understanding should also progress through the Key Stages, for example

  • Early years

Early ideas about balance

  • Years One and Two

Exploring simple see-saws and understanding their movement

  • Years Three and Four

Exploring and understanding a wider range of levers

  • Years Five and Six

Predicting where to put weights to make levers balance

Design and Technology PGCE

vocabulary
Vocabulary

The children’s use of technical vocabulary should progress

during the Key Stages, for example:

  • Early years

Heavier, lighter, hole punch, paper fasteners, joint

  • Years One and Two

Weight, balance, pivot, fixing

  • Years Three and Four

Hinges, joints, scoring, linear movement, linkage

  • Years Five and Six

Load, effort, fulcrum, rotary movement

Design and Technology PGCE

activities involving reclaimed materials
Activities involving reclaimed materials
  • Sorting and shape activities
  • Experiencing different materials
  • Looking at manufacturing processes
  • Packaging
  • Making hinges
  • Creating large structures

Design and Technology Foundation Course

reclaimed materials
Reclaimed materials
  • ‘Junk’ modelling
  • Suitability
  • Comparison to bought materials
  • Safety and hygiene

Design and Technology Foundation Course

task 2
Task 2

Plan a classroom activity that uses simple machines or mechanisms

Design and Technology Foundation Course

investigative disassembly and evaluative activities
Investigative, Disassembly and Evaluative Activities

IDEAs involving two dimensional movement:

  • Look at playground toys
  • Investigate mobiles
  • Examine a selection of puppets
  • Investigate children’s books or greetings cards
  • Consider simple household machines

Design and Technology PGCE

focused practical tasks
Focused Practical Tasks

FPTs involving two dimensional movement:

  • Make jointed models using construction kits
  • Create jointed figures in cardboard
  • Use levers and linkages
  • Make simple sliding mechanisms
  • Try some balancing activities

Design and Technology PGCE

design and make activities
Design and make activities

DMAs using two dimensional movement:

  • Make moving puppets for a show
  • Create a children’s playground for a toy
  • Make a mobile for the classroom
  • Make moving toys to play with
  • Create a class storybook with moving parts

Design and Technology PGCE

safety issues
Safety Issues
  • Classroom organisation
  • Supervision
  • Tool safety
  • Risk assessment on any school visits

Design and Technology PGCE