SHS3 Physics · Semester 1 Week 12: Dynamics

Lesson notes

Learning Objectives

Indicator: 3.1.3.LI.3 - Verify Newton’s third law of motion from momentum change.

By the end of the lesson, learners can:

State Newton’s third law of motion in terms of momentum change for two colliding bodies.
Compare the momentum changes of two bodies involved in an elastic collision and explain how the results verify Newton’s third law.
Calculate the momentum change of each body in a two-body collision and show that the changes are equal in magnitude and opposite in direction.
Use the principle of conservation of momentum to predict the motion of bodies after collision and relate this prediction to Newton’s third law.
Design a simple collision experiment (physically or virtually) to collect data that verifies Newton’s third law, and communicate the findings clearly to peers.

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Curriculum details

Strand: Mechanics and Matter (Strand 1)
Sub-strand: Dynamics (1.3)
Content standard: 3.1.3.CS.1 - Demonstrate knowledge and understanding of collisions 3.1.3.LO.1 Use the concept of momentum change to verify of Newton's second and third laws of motion.
Indicator: 3.1.3.LI.3 - Verify Newton's third law of motion from momentum change.
Suggested placement: Semester 1, Week 12 (Week 12 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.
Source document note: The official curriculum document has a fault in this entry, so the curriculum text above is transcribed exactly as printed:

content standard text - p.161: the document prints this content standard code as 3.1.3.C.S.3.1
indicator text - p.161: the document prints this learning indicator code as 3.1.3.LI.1.3
exemplars - p.161: the document prints this assessment code as 3.1.3.AS.1.3
Curriculum reference: NaCCA curriculum document, p. 161

Exemplars (from the NaCCA curriculum)

Enquiry learning: Let learners verify Newton's third law of motion by comparing the momentum change of one body to another body following from elastic collision.
Recognise diverse talents and perspectives.
Assessment (3.1.3.AS.3). 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