Lesson 6

Chapter 2 Forces
Section 2 More than one force
This lesson
  • Extension
  • Spring constant
  • Resultant force
  • Checking the homework
  • Extra exercise
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Chapter 2 Forces
Section 2 More than one force
This lesson
  • Extension
  • Spring constant
  • Resultant force
  • Checking the homework
  • Extra exercise

Slide 1 - Tekstslide

Force and extension

Slide 2 - Tekstslide

Force and extension

Slide 3 - Tekstslide

Force and extension

Slide 4 - Tekstslide

Force and extension
C=xF
C: Spring constant (in N/m)
F: Force (in N)
x: Extension (in m)

Slide 5 - Tekstslide

Slide 6 - Tekstslide

Slide 7 - Tekstslide

Worksheet resultant force

Slide 8 - Tekstslide

Parallelogram method
  • 1 Choose a suitable scale of forces so that the arrows aren’t too long or too short.
  • 2 Draw in the two forces at the correct scale and at the correct angles.
  • 3 Complete the parallelogram with two dotted lines.
  • 4 Draw the resultant as an arrow from the origin to the opposite corner (the diagonal).
  • 5 Measure the length of the arrow. Use the scale of the forces to determine the magnitude of the resultant force.
  • 6 Determine the direction of the resultant by measuring the angle.

Slide 9 - Tekstslide

Checking the homework

Slide 10 - Tekstslide

Practice exercise
On an experimental setup on the moon a weight with a mass of 5 kilogram is hung on a spring with a spring constant of 0,45 N/m. Calculate the extension of this spring.

Slide 11 - Tekstslide