# .Joe and Brad.

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1. Name the 6 possible terms to describe behaviour of solids.
Brittle, Malleable, Tough, Stiff, Ductile, Hard.
2. Define Brittle.
Will snap under a certain amount of force, but won't deform plastically.
3. Define Ductile.
Can be deformed but retain their strength.
4. Define Malleable.
Can also change shape, however not neccesarilly keep its original strength.
5. Define Hard.
Resistant to cutting, indentation and abrasion.
6. Define Stiff.
Change in shape made difficult because they are resistant to bending and stretching.
7. Define Tough.
The measurement of energy a material can absorb before it breaks.
8. An example of a Brittle material.
• Ceramics: Like glass or pottery.
• Chocolate Bar.
9. An example of a Ductile material.
Copper: Wires.
10. An example of a Malleable material.
• Gold: Jewellery.
• Brass: Musical Instruments.
11. An example of a Hard material.
• Hardend Steel: Cutting Tools.
• Diamonds: Drill Tips.
12. An example of a Stiff material.
• Stafety Helmets.
• Boots.
13. An example of a Tough material.
• Polymers: Polythene.
• Kayaks.
14. What is the Youngs Modulas used for?
To measure stiffness.
15. Define Hookes law.
Extrention is directally proportional to Mass.
16. Equation for Hookes law.
F=kx
17. Define Stress.
Compression.
18. Equation for Stress.
F/A
19. Define Strain.
Tension.
20. Equation for Strain.
X/L
21. Who is the youngs modulous used by most?
Engineers.
22. Word equation for Youngs Modulous.
Stress/Strain.
23. Equation for Youngs Modulous.
(FxL)/(XxA).
24. What unit is Stress measured in?
Pascall (Pa).
25. What unit is Strain measured in?
None.
26. What unit is Youngs Modulous measured in?
Pascall (Pa).
27. If an object is defined as elastic,
will deformation be permanent?
No.
28. If an object is defined as plastic, will deformation be permanent?
Yes.

### Card Set Information

 Author: McAuley ID: 174684 Filename: .Joe and Brad. Updated: 2012-10-01 14:32:16 Tags: Testing Materials Folders: Description: Hookes Law and Youngs Modulous. Show Answers:

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