SHS3 Physics · Semester 1 Week 10: Kinematics

Lesson notes

Learning Objectives

Indicator: 3.1.2.LI.4 - Determine the energy stored in a system performing SHM.

By the end of the lesson, learners can:

Derive expressions for the potential energy and kinetic energy of a body performing simple harmonic motion in terms of displacement, amplitude, mass, and angular frequency.
Calculate the total mechanical energy of a simple pendulum at any point in its oscillation, given the mass, amplitude, and length or angular frequency.
Determine the energy stored in a helical spring from the area under the load-extension graph, and use this to calculate the elastic potential energy for given extensions.
Apply the principle of conservation of mechanical energy to solve problems involving energy transfer between kinetic and potential forms in SHM systems.
Interpret energy-displacement graphs for a system performing SHM, identifying the points of maximum kinetic energy, maximum potential energy, and total energy.

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Curriculum details

Strand: Mechanics and Matter (Strand 1)
Sub-strand: Kinematics (1.2)
Content standard: 3.1.2.CS.1 - Demonstrate knowledge and understanding of simple harmonic motion. 3.1.2.LO.1 Use the concept of simple harmonic motion to determine acceleration due to gravity.
Indicator: 3.1.2.LI.4 - Determine the energy stored in a system performing SHM.
Suggested placement: Semester 1, Week 10 (Week 10 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. 157

Exemplars (from the NaCCA curriculum)

Experiential Learning: Let learners discuss the energy of a body performing simple harmonic motion for simple pendulum. For the helical spring apply your knowledge from area under the load- extension graph.
Encourage self-awareness and personal growth by fostering an environment where learners feel comfortable sharing their reflections and experiences.
Assessment (3.1.2.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 laboratory virtual
- Retort stand
- Spring with pointer
- Meter rule
- String
- Masses