Forces and elasticity

Question 1

When you apply more than 1 force to an object, what could occur?

Answer 1

• You may cause the object to compress, stretch or bend

Question 2

Define elastic object

Answer 2

An object has been elastically deformed if it can go back to its original length and shape after the force has been removed. Elastically deformed objects = elastic objects

Question 3

Define non elastic object

Answer 3

An object has been inelastically deformed if it can not return to its original length and shape after the force has been removed
inelastically deformed objects = non elastic object

Question 4

work is done when an object is stretched , compressed, but, where is the energy transferred?

Answer 4

• to the elastic potential energy store of the object
  -If it is elastically deformed, all energy is transferred to the elastic potential energy store of the object

Question 5

Extension is ∝ to …

Answer 5

load or force applied

Question 6

How do you work out force?

Answer 6

Force (N) = spring constant (n/m) x extension (m)

Question 7

details on equation

Answer 7

• Equation applied for compression also
• Spring constant depends on material
  stiffer spring = greater spring constant

Question 8

What is the issue with force applied ∝ extention?

Answer 8

• There is a limit to the amount of force you can apply for the extension to keep on increasing proportionally.

Question 9

Define limit of proportionality

Answer 9

• max force
  -extension is no longer ∝ to force