Team 3

r

Han ChuanIzzharifIzzuddinTang JieColin Zulfahi

Quiz

Izzuddin

r

1)-they must resist force-must not collaspe during use-must hold parts in the right place2)constructed by joining seperated pieces of materials,members to support various parts3)the skins itself provides strenght and rigidity4)-support-span-contain-protect5)external-internal-6)dynamic-force that changes magnitude,position and directon on a structurestatic-force that has a constant magnitude,position and direction on or within a structure7)-tension-compreesion-bending-torsion-shear

Izzharif

r

1) Sturcture come in all shape and size that must resist force, must not collapse during use and must hold parts in the parts2) Constructed by joining separate pieces of material that support and protect various parts3) The outer shell provides strength and rigidity4) Span. support, contain and protect5) External and internal. external means the end of the force reaction while internal means the first force reaction.6) Static load and dynamics load. Static load means force that has a constant magnitude, position and direction on while dynamics load means force that changes magnitude, position and direction on a structure.7) Tension, compression, bending, torsion and shear

TangJie

r

Q1. Defination of structures Q2. What is a frame structure.

Colin

r

1) Sturcture come in all shape and size that must resist force, must not collapse during use and must hold parts in place.2) Constructed by joining separate pieces of material that support and protect various parts3) The outer shell provides strength and rigidity4) Span. support, contain and protect5) external - the end of the force reaction interna l- the first force reaction.6) Static load - force that has a constant magnitude with force against/withing the structuredynamic load - force that changes magnitude, position and direction on a structure.7) Tension, compression, bending, torsion, shearing

Zul

r

1) Sturcture come in all shape and size that must resist force, must not collapse during use and must hold parts in the parts2) Constructed by joining separate pieces of material that support and protect various parts3) The outer shell provides strength and rigidity4) Span. support, contain and protect5) External and internal. external means the end of the force reaction while internal means the first force reaction.6) Static load and dynamics load. Static load means force that has a constant magnitude, position and direction on while dynamics load means force that changes magnitude, position and direction on a structure.7) Tension, compression, bending, torsion and shear

Mechanism

Definition

They help us move things

they help us control things

Types of Mechanism

Levers

Class 1

in the first class , the fulcrum is between the load and the effort

Scissors , boom of an excavator

Class 2

In the second class , the load is between the fulcrum and the effort

Arms of a nutcracker , tin opener

Class 3

Cam And Follower

Gears

Pulleys

Wheel And Axle

Linkage

Types of movement

Circular / Rotary

Movement in crircle

Pedals on a bike

ceiling fan

drilling machine

Oscilating

Movement backwars and fowards in the arc of a cirlce

Pendelum of a clock

windscreen wiper

Linear

Movement in a straight line

lift

sliding door

A car moving along a road

Reciprocating

Movement backwards and forwards along a straight line

A needle on a sewing machine

jig saw blade

pile driver

Functions of mechanism

Conversion of motion

Used to change one type of motion into another

Glue stick

Control of motion

used to contorl : speed/direction/distance/amount of force produced by amovement .

A clock mechanism

hand drill

pantograph mechanism

screwjack

Transmission of motion

Used to change the place of movement

Lever on the bathroom tap

Types of control system

has feedback . can respond to the changes in the environment

toilet cistern

Subtopic

Subtopic

Has no feedback ,cannot respond to the changes in the environment

water tap

Structure

Man-made

Types of man-made structure

Frames

Examples

Cranes

Cranes

Skycappers

Skycappers

Scaffolding

Scaffolding

Brigde

Brigde

Defination of man-made frames

Constructed by joining separate pieces of material that support and protect various parts

Shells

Examples

Body of a vehicle

Helmet

Rubbish Bin

Drink Cartoon

Defination of man-made shells

Have an outer layer

The shell itsef provides rigidity and strength

Defination of man-made

Not natural.

Made by man: factory made

Functions of structure

Support

Own load

Vehicles

Other loads

Chairs

Bed

Tables

Span

spanning between two points to withstand loads

Brigde

Contain

Folded or shaped to make storage containers

tanks for liquids such as oil

Protect

able to absorb small knocks and bumps

safety helmet

Drink Carton

cardboard boxes

Natural

Defination of natural

non-man made formed by nature

Types of natural structure

Frames

Examples

Animal Skeleton

Trees

Spider Web

Leaf

defination of natural frames

Subtopic

shells

Examples

Crab Shell

Honeycomb

Bird Nest

Defination of natural shells

The skin itself provides strength and rigidity

Do not have frame

Defination of structure

must be able to resist forces,

not to collapse during use

must hold parts in the right places .

Loads

Static loads

Examples

Subtopic

Force that has a constant magnitude , position and direction on or within a structure

Dynamic loads

Examples

Subtopic

Force that changes magnitude , position and direction on a structure