Materials Flashcards
0
Q
You can tell if an object obeys hookes law on a graph
A
If it is directly proportional (straight line through the origin)
1
Q
Hookes law
A
Load is directly proportional to the extension provided that you dont go beyond the elastic limit
2
Q
If an object goes beyond its elastic limit…
A
- weakens
- behaves plastically
- permanently deformed
- on a graph curves to a horizontal line
3
Q
What is meant by an object behaving plastically?
A
Doesnt return to its normal shape ie bluetac
4
Q
Elastic band graph is … Proportional
A
Not directly
5
Q
An elastic band doesnt behave…
A
Plastically as it returns to its original shape
6
Q
Do elastic bands obey hookes law
A
No as the graph doesnt show a straight line (even though it goes through the origin)
7
Q
Elastic band graphs go like a … As when stretched it goes from weak to strong
A
S
