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MS-PS2-1

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MS-PS2-1 Motion and Stability: Forces and Interactions
Students who demonstrate understanding can: Apply Newton’s Third Law to design a solution to a problem involving the motion of two colliding objects.*
Clarification Statement: Examples of practical problems could include the impact of collisions between two cars, between a car and stationary objects, and between a meteor and a space vehicle.
Assessment Boundary: Assessment is limited to vertical or horizontal interactions in one dimension.
Crosscutting Concepts	Science & Engineering Practices	Disciplinary Core Ideas
Systems and System Models: Models can be used to represent systems and their interactions—such as inputs, processes and outputs—and energy and matter flows within systems.	Constructing Explanations (for science) and Designing Solutions (for engineering): Constructing explanations and designing solutions in 6–8 builds on K–5 experiences and progresses to include constructing explanations and designing solutions supported by multiple sources of evidence consistent with scientific ideas, principles, and theories. Apply scientific ideas or principles to design an object, tool, process or system.	Forces and Motion: For any pair of interacting objects, the force exerted by the first object on the second object is equal in strength to the force that the second object exerts on the first, but in the opposite direction (Newton’s third law). Interdependence of Science, Engineering, and Technology on Society and the Natural World: The uses of technologies and any limitations on their use are driven by individual or societal needs, desires, and values; by the findings of scientific research; and by differences in such factors as climate, natural resources, and economic conditions.