Material

HideShow resource information
Define brittle
Cracks or breaks with little deformation
1 of 31
Define malleable
Can be deformed under compression
2 of 31
Define ductile
Can be easily pulled out by tensile force into longer thinner shapes
3 of 31
Define stiff
Doesn't change shape when a force is applied.
4 of 31
Define tough
Able to withstand impact forces without breaking
5 of 31
Define plastic
Remains deformed when the load is removed
6 of 31
Define elastic
Returns to its original shape when the load is removed
7 of 31
Define hard
Doesn't scratch or dent easily and is able to resist plastic deformation
8 of 31
What is a tensile force?
A force that acts to pull or stretch out a material.
9 of 31
What is a compressive force?
A force that causes an object to become squashed or compacted.
10 of 31
Define strong
Able to withstand both tensile or compressive stress.
11 of 31
On a stress-strain graph what is the yield point?
At the yield point the material suddenly starts to stretch without any extra load - it is the stress at which a large amount of plastic deformation takes place with a constant or reduced load.
12 of 31
What is the limit of proportionality on a stress-strain graph?
The point at which the material stops obeying Hooke's law, but would still return to its original shape if the stress was removed.
13 of 31
What is the elastic limit on a stress-strain graph?
The point at which the material starts to behave plastically - the material would no longer return to its original shape once the stress was removed.
14 of 31
What is a fluid element?
A part of the fluid in which all the particles are flowing in the same direction at the same rate (with the same velocity)
15 of 31
What is a flow line?
The path that a particular fluid element follows.
16 of 31
A stable flow line is called...
a streamline.
17 of 31
What is laminar flow?
Laminar flow is a flow pattern where all the fluid elements flow in the same direction. The streamlines run parallel to each.
18 of 31
When does laminar flow usually occur?
When a fluid is moving slowly.
19 of 31
What is turbulent flow?
A flow pattern where the fluid elements get mixed up - you cannot draw streamlines because the flowlines are unstable.
20 of 31
When does turbulent flow occur?
When a fluid is flowing quickly.
21 of 31
What is viscous drag?
The force of friction produced by a flowing fluid when fluid elements with different velocities move past eachother.
22 of 31
What does the viscous drag depend on?
The viscosity of the fluid.
23 of 31
What does Stokes law help us to calculate?
The force due to viscous drag on a spherical object moving through a fluid.
24 of 31
What is upthrust equal to?
The weight of fluid displaced.
25 of 31
What happens to the spring constant and extension of a spring when it parallel with another spring?
The spring constant doubles and the extension will be halved.
26 of 31
What happens to the spring constant and extension of two springs in series?
The spring constant halves and the extension doubles.
27 of 31
What is the effect of stress on a material?
To pull the atoms apart from one another.
28 of 31
What is the ultimate tensile stress of a material?
This is the maximum stress that the material can withstand.
29 of 31
How do we find the elastic strain energy on a force extension graph?
Calculate the area under the graph.
30 of 31
What is a Young's Modulus for a material?
The stress divided by the strain (the gradient on a stress strain graph)
31 of 31

Other cards in this set

Card 2

Front

Define malleable

Back

Can be deformed under compression

Card 3

Front

Define ductile

Back

Preview of the front of card 3

Card 4

Front

Define stiff

Back

Preview of the front of card 4

Card 5

Front

Define tough

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Physics resources:

See all Physics resources »See all Materials resources »