P1.3-KS3

1.3 Squashing and stretching

Resource

Worksheet

Worksheet ANS

Investigation

Video Resource

Friction.mov

Friction


Marshmallow.mp4

Marshmallow

Squashing

Tugowar.mp4

Tug of war

Tension

Practical

1.2 Squashing and stretching


Class:

  • Marshmallows (1 each)
  • Feltip pen to draw on marshmallow


Hookes law -

  • Elastic band
  • Masses
  • Rulers
  • Right angled triangle rulers
  • Meter sticks


Students using marshmallows to see deformations.

Introduce how an object will have a normal force.

Risk assessment:

  • No risk



Risk assessment:

  • Safety classes
  • masses dropping onto floor.
  • elastic bands snapping

Target:

• State an example of a force deforming an object

• Recognise a support force

• Use Hooke’s Law to identify proportional stretching

• Present data in a line graph and identify a pattern


• Describe how forces deform objects

• Explain how solid surfaces provide a support force

• Use Hooke’s Law to predict the extension of a spring

• Present data on a graph, and identify a quantitative relationship in the pattern


• Explain how forces deform objects in a range of situations

• Explain how solid surfaces provide a support force, using scientific terminology and bonding

• Apply Hooke’s Law to make quantitative predictions with unfamiliar materials

• Present data in a graph and recognise quantitative patterns and errors