4.5.3 - Forces and elasticity

Question 1

What is Hooke’s Law?

Answer 1

The extension of an elastic object, such as a spring, is directly proportional to the force applied, provided that the limit of proportionality is not exceeded.

Question 2

How do you know if an object is elastic?

Answer 2

If it returns to its original shape when the forces deforming it are removed

Question 3

Describe the difference between elastic and inelastic deformation.

Answer 3

In elastic deformation, deformation is reversed when the force is removed (provided that the limit of proportionality is not exceeded).

In inelastic deformation, deformation is not fully reversed when the force is removed ; there is a permanent change.