# L20 - Remember:ThisWeek...

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Remember: This Week Start to read Ch. 6 (Work & Energy): 6.1, 6.3, 6.4, 6.5, 6.6. CAPA assignment #7 is due this evening at 10 PM, to be done on‐line. Mid‐Term Exam II: next Tuesday at 7:30 PM here and next door. Last half of Ch. 3.5‐3.6, Ch. 4, & Ch. 5.1,5.2,5.6‐5.9. L20 W 2/26/10 1 Physics 2010

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L20 W 2/26/10 Physics 2010 2 D. Ch. 5: Circular Motion; Gravity 5-1. Kinematics of Uniform Circular Motion 5-2. Dynamics of Uniform Circular Motion 5-6. Newton’s Law of Universal Gravitation 5-7. Gravity Near Earth’s Surface 5-8. Satellites and “Weightlessness” 5-9. Kepler’s Laws and Newton’s Synthesis. For Mid-Term Exam II: A. Recall “Kinematical Equations” for 1D motion. B. Ch. 3: Kinematics in 2D 3-4. Adding Vectors by Components 3-5 & 3-6. Projectile Motion & Solving Problems C. Ch. 4: Newton’s Laws of Motion 4-2. First Law 4-3. Mass 4-4. Second Law 4-5. Third Law 4-6. Weight & the Normal Force 4-7. Solving Problems & Free-Body Diagrams 4-8. Friction & Inclines
L20 W 2/26/10 Physics 2010 3 Material at your disposal: A.Text book & Dr. Dubson’s Chapter Notes. B. CAPA problems. C. Clicker questions from class & lecture notes. D. Previous Mid-Term exam on CULearn. E. Giancoli’s web site: http://cwx.prenhall.com/bookbind/pubbooks/giancoli/ Particularly the “Practice Problems For Mid-Term Exam II:

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L20 W 2/26/10 Physics 2010 4 Remember: A large part of what you’ll be expected to do is to apply Newton’s Laws. You can’t just memorize and apply formulas. Steps for Rectilinear Motion: 1. Draw a free-body diagram identifying and labeling all forces. 2. Choose a coordinate system – typically with the forces pointing in the coordinate directions (x,y) as much as possible. 3. Write down Newton’s 2 nd law in each coordinate direction (typically), summing the forces. The equation perpendicular to the direction of motion often allows you to Fnd the Normal ±orce, which is needed to determine the force of friction. Σ ± x = ma x Σ ± y = ma y (for rectilinear motion) If a force is not in a coordinate direction, you must Fnd its components in the coordinate directions.
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## This note was uploaded on 08/24/2010 for the course PHYS 2010 taught by Professor Dubson during the Spring '06 term at Colorado.

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L20 - Remember:ThisWeek...

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