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SCIENCE > Section 4: Technology > Flashcards

Section 4: Technology Flashcards

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1
Q

Name the mechanical properties of materials. Hint there are 6

A 
hardness 
elasticity 
resilience 
ductility 
stiffness 
malleability
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2
Q

What is hardness?

A

the ability to resist indentation or abrasion

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3
Q

What is elasticity?

A

the ability to return to their original shapes after undergoing a constraint

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4
Q

What is resilience?

A

ability to take shocks without breaking

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5
Q

What is ductility?

A

ability to be stretched without breaking

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6
Q

what is malleability?

A

ability to be flattened or bent without breaking

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7
Q

What is stiffness?

A

ability to retain their shapes when subjected to various constraints

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8
Q

Name the 8 possible links. Hint think of them in pairs.

A

Direct- Indirect
Rigid-Flexible
Removable- Non-removeable
Complete-Partial

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9
Q

What is a direct link?

A

two parts hold together without a linking component

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10
Q

What is an indirect link?

A

the parts require a linking component to hold them together (screws, wires, glue)

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11
Q

What is a rigid link?

A

linking component or the surfaces of the linked parts are rigid

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12
Q

What is a flexible link?

A

linking component or the surfaces of the linked parts can be deformed (springs, rubber)

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13
Q

What is a removable link?

A

the linked parts can be separated without damaging either their surfaces or the linking component (nuts and screws are used in removable links)

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14
Q

What is a non-removeable link?

A

separating the linked parts damages their surfaces or the components

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15
Q

What is a complete link?

A

prevents the linked parts from moving independently of one another (bike wheel)

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16
Q

What is a partial link?

A

at least one part can move independently of the other parts (roller blade wheels)

17
Q

Name the 3 types of guiding

A

translational, rotational, helical

18
Q

What is translational guiding?

A

straight back and forth motion

19
Q

What is rotational guiding?

A

ensures circular motion of a moving part

20
Q

What is helical guiding?

A

ensures the translational motion of a moving part while it rotate about the same axis (rotates in a circle while moving up and down or back and forth)

21
Q

Name 5 types of constraints

A 
compression 
tension 
torsion 
deflection 
shearing
22
Q

What is compression?

A

crushing forces

23
Q

What is tension?

A

stretching forces

24
Q

What is torsion?

A

twisting forces

25
Q

What is deflection?

A

bending forces

26
Q

What is shearing?

A

cutting forces

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