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ENDURING UNDERSTANDING 1.A The internal structure of a system determines many properties of the system.
Science Practices
1.1 The student can create representations and models of natural or man-made phenomena and systems in the domain.*
7.1 The student can connect phenomena and models across spatial and temporal scales.*
BIG IDEA 3
Force Interactions INT
§ How can the motion of objects be predicted and/or explained?
§ Can equations be used to answer questions regardless of the questions’ specificity?
§ How can the idea of frames of reference allow two people to tell the truth yet have conflicting reports?
Change:
§ How can we use models to help us understand motion?
§ Why is the general rule for stopping your car “when you double your speed, you must give yourself four times as much distance to stop?”
ESSENTIAL KNOWLEDGE
1.A.1
A system is an object or a collection of objects. Objects are treated as having no internal structure.
a. A collection of particles in which internal interactions change little or not at all, or in which changes in these interactions are irrelevant to the question addressed, can be treated as an object.
b. Some elementary particles are fundamental particles, (e.g., electrons). Protons and neutrons are composed of fundamental particles (i.e., quarks) and might be treated as either systems or objects, depending on the question being addressed.
c. The electric charges on neutrons and protons result from their quark compositions.
1.A.5
Systems have properties that are determined by the properties and interactions of their constituent atomic and molecular substructures. In AP Physics, when the properties of the constituent parts are not important in modeling the behavior of the macroscopic system, the system itself may be referred to as an object.
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