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Physics Edexcel > Materials > Flashcards

Flashcards in Materials Deck (17)
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1
Q

Laminar Flow

A
  • Streamline

- layers do not mix

2
Q

Turbulent Flow

A
  • Not streamline

- Mixing of layers

3
Q

Stoke’s Law

A

viscous drag = 6(pi)(viscocity)rv

4
Q

Stoke’s Law only works if

A
  • Low speed
  • Small
  • Spherical
  • Terminal Velocity
  • Through a fluid
5
Q

Density =

A

mass / volume

6
Q

Upthrust

A

Weight of fluid displace (DensityxVolumexGravity)

7
Q

Hooke’s Law

A

Stretching Force = Spring Constant x extension

8
Q

What is Hooke’s Law

A

Stretching Force is directly proportional to extension

9
Q

Spring Constant

A

Stiffness

10
Q

Elastic Limit

A

Where material will not return to its original size

11
Q

Gradient of a force extension graph

A

spring constant

12
Q

Hooke’s Law also applies to

A

Compression

13
Q

Area under force extension graph

A

Elastic potential energy

14
Q

Stress

A

A measure of strength (Force/Cross sectional area)

15
Q

Strain

A

A fraction of extension to original length (extension/original length)

16
Q

Young Modulus

A

How difficult it is to change the shape of something (Stress/Strain)

17
Q

Gradient of a stress strain graph

A

Young Modulus