Difference between revisions of "HS-PS2-2"
From NY Science Standards Wiki
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| + | | style="background-color:white;" | [[June 2026 Physics Exam|June 2026]] | ||
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Revision as of 22:36, 20 September 2026
Use mathematical representations to support the claim that the total momentum of a system of objects is conserved when there is no net force on the system.
Clarification statement: Emphasis is on the quantitative conservation of momentum in interactions and the qualitative meaning of this principle.
Assessment boundary: Assessment is limited to systems of two macroscopic bodies moving in one dimension.
Regents Exam Questions
Released New York State Regents exam questions that assess HS-PS2-2 are listed here by exam and question cluster. Each link opens the question with its answer key.
| Exam | Cluster | Question |
|---|---|---|
| June 2026 | From Astro Blaster to Supernova | Question 38 |
Performance Level Descriptions
Every Regents exam question on HS-PS2-2 is written to match one of the performance level descriptions (PLDs) below.
Level 1: Given data and/or a model, use a mathematical representation for momentum to identify the mass, or the momentum (with or without direction), or the velocity/speed of an object.
Level 2: Given data and/or a model, use a mathematical representation to determine the total momentum, with or without direction, of a system of objects before or after an interaction when there is no net force on the system.
Level 3: Given data and/or a model, use a mathematical representation for the conservation of momentum to determine the mass and/or velocity of an object before or after an interaction between two objects when there is no net force on the system.
Level 4: Use mathematical representations to support the claim that the total momentum of a system of objects is conserved when there is no net force on the system.
Level 5: Collect and analyze data and use mathematical representations to support the claim that the total momentum of a system of objects is conserved when there is no net force on the system.
Resources
Examples and discussion of resources for the learning, teaching, and assessment of HS-PS2-2.
This section could be expanded upon. You can help out by adding to this section.
NGSS Dimensions
Performance expectation HS-PS2-2 was developed using the following elements from the NRC document A Framework for K-12 Science Education:
Science and Engineering Practices
- Using Mathematics and Computational Thinking
- Use mathematical representations of phenomena to describe explanations.
Disciplinary Core Ideas
- PS2.A: Forces and Motion
- Momentum is defined for a particular frame of reference; it is the mass times the velocity of the object.
- If a system interacts with objects outside itself, the total momentum of the system can change; however, any such change is balanced by changes in the momentum of objects outside the system.
Crosscutting Concepts
- Systems and System Models
- When investigating or describing a system, the boundaries and initial conditions of the system need to be defined.
Page contributors: Caroline Leonard, Conrad Richman