2. Chapter 5 Using Newton’s Laws with Friction, Circular Motion and Drag Forces http://phys23p.sl.psu.edu/phys_ani m/mech car banked new.avi conical pendulum pretty.avi

3. Introduction: Our approach Friction – static and kinetic Circular motion – uniform motion – highway curves, banked and not – non-uniform motion Drag force – terminal velocity

4. Friction Kinds (“rolling” later) – kinetic (sliding) – static Complex phenomena Example EXERCISE EXERCISE Relation to Newton’s Laws – Each (?)

5. Uniform Circular Motion Acceleration – direction EXERCISE – representation (a R and a tan ) – uniform (=?) – a R = v 2 /R Exercises, examples Relation to Newton’s Laws

6. Highway Curves; Banked & Not Relation to Newton’s Laws When is there sliding on unbanked curves? What is the friction force on vehicles going on banked curves? Resource: http://www.mhhe.com/physsci/physical/giam battista/banked_curve/banked_curve.html http://www.mhhe.com/physsci/physical/giam battista/banked_curve/banked_curve.html

7. Non-uniform Circular Motion Components of acceleration – meaning – total acceleration (?) – magnitude of acceleration (?) Relation to Cartesian coordinate representation

8. Drag Force At “low” and “high” speeds; velocity dependence (?) Example, low speeds (e.g. boat in water) Terminal velocity – key? (a = 0) Example: In slow case, derive the expression for the terminal velocity? – Graph (roughly) the x,v,a motion graphs (?) Modeling, if time available

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10. friction exercise in groups, get whiteboards, pens, erasers Question: At what angle does a wood block slide down a wood incline? (See table 5-1.) – include other variables as needed Question: At this angle, describe the motion of the wood block down the wood incline? back