DLM05Notes

DLM05Notes - Physics 7A DLM 5 Overview CG 2.1 Extending the...

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Physics 7A DLM 5 Overview CG 2.1 Extending the Energy Interaction Model to Mechanical Energies (Qualitative Discussion) Act 2.1.3 Followup of DLM04 FNTs (~45 min ) Learning Goals: Practice thinking about mechanical energies. Practice seeing the power of actually carrying out the steps of the energy-interaction model, including making energy-system diagrams, to answer counter-intuitive questions. Practice connecting everyday experience with mechanical energies and the energy-interaction model. Act-2.1.4 Finding the Missing Energy System ( ± 45 min) Learning Goals: Practice using the energy-interaction model with mechanical energy systems: making inferences and comparing with observation. CG 2.2 Mechanical Energies—Quantitative Applications Act-2.2.1 Modeling with Quantitative Expressions of Mechanical Energies (~45 min) Learning Goals: Become familiar with and comfortable using the algebraic expressions for changes in gravitational PE and translational KE. i. Understand and know that ± PE gravity = mg ± y ii. Understand and know that ± KE = 1/2 m ± (v 2 ) iii. Understand and know that ² PE mass-spring = ² PE spring = 1/2 k ± (x 2 ). Practice using the energy-interaction model with mechanical energy systems and making numerical predictions.

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