Elasticity Flashcards

1
Q

What is deformation and the different types?

A
  • When an object changes shape, we say it has been deformed
  • Elastic deformation: when the object returns to its original shape
  • Inelastic deformation: when the object doesn’t return to its original shape
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is extension?

A
  • The increase in length of a string when it is stretched
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the point after which a string no longer returns to its original shape called?

A
  • Its limit of proportionality
  • Its elastic limit
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What can applying a force to an object cause the object to do?

A
  • Stretch
  • Compress
  • Bend
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the minimum number of forces required for an object to stretch, compress or bend?

A
  • Minimum 2 forces
  • Or else the object would move with the force
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is an objects spring constant?

A
  • A measure for how many newtons of force it requires for the object to be stretched by 1 metre
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is hooke’s law?

A
  • The extension of an elastic object is directly proportional to the force applie to it, up to its limit of propotionality
  • F = k x e
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the two equations for elasticity?

A
  • F = k x e
  • Ee = 0.5 x k x e^2
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What does the gradient on a force-extension graph tell us?

A
  • Tells us the object’s spring constant
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What does the area under the curve on a force-extension graph tell us?

A
  • Elastic potential energy
How well did you know this?
1
Not at all
2
3
4
5
Perfectly