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Science Unit 3 > Science unit 4 topic 1-4 > Flashcards

Science unit 4 topic 1-4 Flashcards

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1
Q

function of a structure

A

what a structure is made to do. Eg;Transport

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2
Q

margin of safety

A

Building something that is safe and will be for a long time

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3
Q

How do you choose a material

A

Based on the structures function

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4
Q

Composite Materials

A

made with several different materials good for serving multiple purposes

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5
Q

Layered materials

A

different materials layered and stuck together.have different materials more useful with different functions. Eg;windshield

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6
Q

woven materials

A

fibres are woven interlocked making it flexible. EG;shirt

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7
Q

what is mass

A

how much matter is in something

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8
Q

force

A

a push or pull on an object

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9
Q

weight

A

force of gravity put on a mass measured in newtons

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10
Q

How do you measure mass

A

in kilograms using a balance scale ( to get from grams to kg divide by 1000)

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11
Q

what is used to measure force

A

Newtons using a spring scale

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12
Q

Convert mass to force

A

Kg to Newtons= kgx10

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13
Q

External forces

A

A force acting on the outside eg;wind

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14
Q

Internal forces

A

a force that acts on the inside eg;lungs

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15
Q

dead load

A

a permanent force eg;the weight of the structure it’self

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16
Q

Live load

A

a force that comes and goes eg;wind

17
Q

Tension force

A

Stretch a material.tensile strength is the longest an object can handle before breaking

18
Q

Compression force

A

squeeze a material together.Compressive is how long a material goes before losing shape or breaking

19
Q

Shear force

A

bend or tear a material by pulling it in opposite in different directions.Shear strength how much shear force a material can stand before ripping

20
Q

torsion force

A

twisting a material.Torsion strength the most torsion force a material can take and still spring back to it’s original shape

21
Q

Steel tensile strength

A

particles pull together and need a lot of force to break it

Science Unit 3 (4 decks)

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