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Remember: This Week Read Ch. 6 (Work & Energy): En6re chapter. Read Ch. 7 (Momentum): Ch. 7.1 – 7.6, 7.8. CAPA assignment #9 is due Friday evening at 10 PM, to be done on‐line. Lab this week : Energy & Momentum. Do on‐line and print Prelab prior to the Lab Session. Includes Momentum, which we’ll only begin to discuss this week. L24 M 3/8/10 1 Physics 2010

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L23 F 3/5/10 Physics 2010 2 1. To present more algebraic steps in problems worked in class. 2. To use more clicker questions, particularly right before the exam (to be used for study). 3. To give solutions to the CAPA problems weekly. 4. To set-up the exam Facebook discussion group earlier before the exam. 5. To offer a weekly problem session. 6. To offer a problem session on the day before the exam. 7. To make exam questions less wordy and less confusing. 8. To have fewer questions on the exam with the option “None of the above. Student suggestions that could lead to better performance on the next exam:
L24 M 3/8/10 Physics 2010 3 Ch. 6 Energy What’s Energy? – hard to define, comes in many forms Definition: Energy is the ability to do “Work” . We consider subjects in the following order: 1. Work 2. Kinetic Energy (KE) 3. “Work-Energy Principle” 4. Potential Energy (PE) 5. Conservation of “Mechanical Energy”

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L24 M 3/8/10 Physics 2010 4 Component of “specific” force along displacement x displacement KE = 1 2 mv 2 W net = W Fnet = Δ KE = KE f - KE i (No change in PE, no dissipation.) 1. Work: 2. Kinetic Energy: 3. Work – Energy Principle:
L24 M 3/8/10 Physics 2010 5 PE is the amount of work done on a system by an external

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