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Physics Year 1 > Solid Materials > Flashcards

Solid Materials Flashcards

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1
Q

what is σ

A

stress

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2
Q

what is ε

A

strain

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3
Q

what is F

A

force

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4
Q

what is A

A

cross sectional area

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5
Q

what is x

A

original length

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6
Q

what is Δx

A

extension

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7
Q

what is E

A

young modulus

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8
Q

what is k

A

spring constant

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9
Q

what is stress measured in

A

PA or Nm-2

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10
Q

what is strain measured in

A

Nothing- it is a ratio

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11
Q

what is force measured in

A

Newtons

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12
Q

what is A measured in

A

m2

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13
Q

what is x and Δx measured in

A

m

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14
Q

what is E measured in

A

Nm-2

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15
Q

what is k measured in

A

Nm-1

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16
Q

In order, what are the points on a stress/strain graph?

A

limit of proportionality
elastic limit
yield point
Ultimate Tensile Strength
breaking point

17
Q

What is the area under a stress strain graph (straight part)

A

work done per unit volume

18
Q

what is the limit of proportionality

A

maximum point where stress is directly proportional to strain

19
Q

what is the elastic limit

A

point where material stops behaving elastically

20
Q

what is the yield point

A

point before which atomic structure of material is reorganised and lower force is needed for same extension

21
Q

what is the UTS

A

maximum stress a material can handle

22
Q

what is the breaking point

A

point where material breaks (duh)

23
Q

area between loading and unloading lines on stress strain graph=

A

energy transferred to internal energy in the material

24
Q

what is a stiff material

A

resists deformation by tension or compression

25
Q

what is a brittle material

A

does not plastically deform

26
Q

what is an elastic material

A

returns to original shape after deformation

27
Q

1 spring has elastic strain energy E
2 springs in ‘series’ have elastic strain energy…

A

2E

28
Q

1 spring has elastic strain energy E
2 springs in parallel have elastic strain energy…

A

1/2 E

29
Q

what is ΔE(el)

A

elastic strain energy

30
Q

what are units for ΔE(el)

A

Joules

31
Q

what is ρ

A

density

32
Q

what is ρ measured in

A

Kgm-3

33
Q

what is m

A

mass

34
Q

what is m measured in

A

kg

35
Q

what is v

A

volume

36
Q

what is v measured in

A

m3

37
Q

How to find density of irregular object

A

-scales to find mass
-eureka can to fond volume
-use density equation

38
Q

Have a break :)

A

https://www.youtube.com/watch?time_continue=4&v=dQw4w9WgXcQ&embeds_referring_euri=https%3A%2F%2Fwww.bing.com%2F&embeds_referring_origin=https%3A%2F%2Fwww.bing.com&source_ve_path=MTM5MTE4LDEzOTExOCwyODY2Ng&feature=emb_logo

Physics Year 1 (5 decks)

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