2A - Elasticiteit, uitrekking en hooke's law

This lesson
  • Elasticity and extension
  • Discussing the practical
  • Hooke's law
1 / 17
next
Slide 1: Slide
Natuurkunde / ScheikundeMiddelbare school

This lesson contains 17 slides, with interactive quizzes and text slides.

Items in this lesson

This lesson
  • Elasticity and extension
  • Discussing the practical
  • Hooke's law

Slide 1 - Slide

 – at the end of this lesson you ...
  • can correctly explain what elasticity and extension are.
  • can Understand what the graph of the practical showed you.
  • know hoooke's law, can rearrange it and can apply it correctly
Goals

Slide 2 - Slide

What is extension?

Slide 3 - Mind map

Extension = final lenght – original length

Slide 4 - Slide

What does elasticity mean?

Slide 5 - Mind map

Elasticity
When something regains it’s original shape after having changed shape

Slide 6 - Slide

Slide 7 - Slide

Discussing
the practical

Slide 8 - Slide

Hooke's Law

Force  =  spring constant  x  extension


F=kx

Slide 9 - Slide

Exersise!
Rearrange hooke's law

Slide 10 - Slide

The formula to calculate
the spring constant is...

Slide 11 - Mind map

The formula to calculate
the extension is....

Slide 12 - Mind map

Exersise
1) What is the magnitude of the force required to stretch a 20 cm-long spring, with a spring constant of 100 N/m, to a length of 21 cm?

Slide 13 - Slide

Exersise  – solution
1) What is the magnitude of the force required to stretch a 20 cm-long spring, with a spring constant of 100 N/m, to a length of 21 cm?
Solution
x (Extension) = 21 cm - 20 cm = 1 cm
k = 100 N/m
F = ?

F = 100 N/m x 1 cm = 100 Newton

F=kx

Slide 14 - Slide

Exersise  – solution
What is the magnitude of the force required to stretch a 20 cm-long spring, with a spring constant of 100 N/m, to a length of 21 cm?
Solution
x (Extension) = 21 cm - 20 cm = 1 cm
k = 100 N/m
F = ?

F = 100 N/m x 1 cm = 100 Newton

F=kx
What if I dubble the spring constant? BUt apply the same force?

Slide 15 - Slide

The homework
  • §2.3 exersise 1b.
  • All exersises of §2.4.
Working independently

Slide 16 - Slide

 at the end of this lesson you ...
  • can correctly explain what elasticity and extension are.
  • can Understand what the graph of the practical showed you.
  • know hoooke's law, can rearrange it and can apply it correctly
Goals

Slide 17 - Slide