Matter · SHS2 Physics

Lesson notes

Learning Objectives

Indicator: 2.1.2.LI.4 - Calculate Young’s modulus.

By the end of the lesson, learners can:

Define stress, strain and Young’s modulus in their own words, using correct units for each quantity.
Calculate stress as force per unit area (stress = F/A) for a given material under load.
Calculate strain as the ratio of extension to original length (strain = e/L) for a given material under load.
Apply the Young’s modulus formula (E = stress/strain) to calculate the Young’s modulus of a material from experimental data.
Analyse and predict the behaviour of different materials under stress and strain by comparing their calculated Young’s modulus values.

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Curriculum details

Strand: Mechanics and Matter (Strand 1)
Sub-strand: Matter (1.2)
Content standard: 2.1.2.CS.1 - Demonstrate knowledge and understanding the behaviour of materials. 2.1.2.LO.1 Use the concept of elasticity to predict the behaviour of materials under the influence of stress and strain.
Indicator: 2.1.2.LI.4 - Calculate Young's modulus.
Suggested placement: Semester 1, Week 7 (Week 7 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: NaCCA curriculum document, p. 95

Exemplars (from the NaCCA curriculum)

Collaborative learning: Let learners find out the meaning of stress, strain and Young's modulus and use their findings to analyse and predict the behaviour of materials under stress and strain.
Encourage the appreciation and valuing of the skills and abilities of individuals from diverse backgrounds, including gender, race, ethnicity, socioeconomic status, and disabilities.
Assessment (2.1.2.AS.4). The document marks these depth-of-knowledge levels for this indicator: Level 3 Strategic reasoning.
Teaching and Learning Resources:
- Audio-visuals
- Internet
- Projectors
- YouTube
- Interactive virtual laboratory
- Retort stand
- Spring
- Loading pan
- Metre rule
- Pointer
- Masses