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PHY 2048C General Physics I with lab Spring 2011 CRNs 11154, 11161 & 11165. Dr. Derrick Boucher Assoc. Prof. of Physics. Session 3-4, Chapter 4. Chapter 4. Simple Projectile Motion Circular motion Centripetal Acceleration in Uniform Circular Motion Rotational/Translational comparisons.
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PHY 2048CGeneral Physics I with labSpring 2011CRNs 11154, 11161 & 11165 Dr. Derrick Boucher Assoc. Prof. of Physics Session 3-4, Chapter 4
Chapter 4 • Simple Projectile Motion • Circular motion • Centripetal Acceleration in Uniform Circular Motion • Rotational/Translational comparisons
Chapter 4 Practice Problems Chap 4: 7, 37, 47, 49, 61, 65 Unless otherwise indicated, all practice material is from the “Exercises and Problems” section at the end of the chapter. (Not “Questions.”)
2-D Kinematics • The x and y components of the motion are treated separately. • Do not mix up x and y data when setting up and solving equations. • Good strategy: separate paper into “X” and “Y” columns. • Certain events can connect x and y motion at particular moments (certain t values).
2-D Kinematics Equations General 2-D motion “Projectile” motion ay = -g, ax = 0
Example problem Chapter 4 #10 (p. 120)
Circular Motion • Radius is constant (or unimportant) • “Position” is an angle, in radians, θ • Velocity is radians per second, ω (that’s “omega”, not “curly double-u.”) • Acceleration can be along the tangent to the circle, at , or in a radial or “centripetal” direction, ac .
s θ
Example problem Chapter 4 #38 (p. 122)
Example problem Chapter 4 #62 (p. 123)