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Physics A level OCR > Materials (C6) > Flashcards

Materials (C6) Flashcards

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1
Q

What occurs with a net force

A

acceleration or a change in shape

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2
Q

Compressive force is a

A

squeeze

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3
Q

Tensile force

A

stretch

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4
Q

What is an extension

A

change in length

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5
Q

What is Hooke’s law

A

the amount of force applied is directly proportional to the change in length

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6
Q

Units of k in F=kx

A

N/m

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7
Q

What has happened to an object when it reaches it elastic limit

A

It no longer follows Hooke’s Law

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8
Q

What happens in elastic deformation

A

The object returns to its orginal shape

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9
Q

What is it called when an object permantly deforms

A

plastic deformation

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10
Q

What occurs in the elastic region

A

energy is stored

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11
Q

What is it called where energy is lost

A

plastic region

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12
Q

What is work done on a spring graph

A

Area of a force extension graph

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13
Q

Name for up and down when stretching a spring

A

loading and unloading

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14
Q

Name for the material not return to its original size

A

hysteris loop

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15
Q

Define stress

A

Force applied per area

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16
Q

Define strain

A

ratio of change in length to the original length

17
Q

Unit for stress

A

pascal

18
Q

Unit for strain

A

no unit

19
Q

Define ductile

A

Can be hammered into a sheet or stretched into a wire

20
Q

What occurs on the stress strain graph (4)

A

limit of proportionality
Elastic limit
Yield point
Breaking point

21
Q

what is the yield point

A

Where rapid extension occurs after

22
Q

What three things usually occur very close together on a spring extension

A

limit of proportionality
elastic limit
yield point

23
Q

What is UTS

A

Ultimate tensile strength

most force an object can handle

24
Q

What is young’s modulus a measure of

A

stiffness

extension given a pressure

25
Q

What do you have to do with multiple springs

A

be logical

26
Q

Springs in series…

A

each feel the force of the weight

27
Q

Springs in parallel…

A

share the weight

Physics A level OCR (23 decks)

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