| What can happen to a object if it has forces applied to it? | It can be Stretched, Compressed or Bent |
| How many forces is required to deform an object? | At least 2 forces is required |
| What is an elastic deformation? | This is when the object returns to its previous shape after the forces are gone |
| What is a plastic deformation? | This is when the object doesn't return to its original shape after the forces been removed |
| What is the formula for Force Exerted by a Spring? | Force Exerted by a Spring [N] = Extension [m] x Spring Constant [N/m] |
| If you keep stretching a spring with more weight, what happens? | The beginning will show that the more force = more extension. It will be in gradient which is dictated by the Spring Constant [Stiffness]
However it will soon disobey the Hooke's Law [The Formula] and will go past the return of elastic deformation.
This means the Spring cannot turn back to its previous shape and is now in Plastic Deformation. |
| When a force deforms a object, what is done to stretch the object [or bend etc...] | Work is done. Energy is Transferred. |
| Where is the energy transferred too? | In a Elastic deformation, the energy is transferred to the objects Elastic Potential Energy Store. |
| What is the equation for the Energy Transferred in Stretching? | Energy Transferred in Stretching [J] = 0.5 x Spring Constant [N/m] x (Extension)² (m)² |
| How can you find it in a Force-Extension Graph? | It is equal to the area underneath the line in the Graph. You cannot however find it above the Elastic Limit. |
