PROBLEMS TO BE WRITTEN UP AND TURNED IN AT RECITATION

     These 5 problems are due at your first recitation meeting after 
     Thur. 11/18.  Each problem should be written on a single sheet 
     of paper (you may use front and back if necessary); the five sheets
     should then be stapled together.  Please order your sheets in the
     order below.  For full credit, the work must be neat, with symbols 
     defined in clearly labeled diagrams.  The labels must be in BOTH 
     words and symbols.  For each part of each problem, you must BRIEFLY 
     explain your strategy in words, as well as neatly showing your 
     physics equations and math, with proper units. 
     
       #1 WOLFSON - CHAPTER 13 - PROBLEM 12 (page 331)  (5 points)

       #2 WOLFSON - CHAPTER 13 - PROBLEM 40 (page 332)  (10 points)
          (In this problem neglect the distance between the center
           of the wheel and the axis of the turntable.)

       #3 WOLFSON - CHAPTER 13 - PROBLEM 52 (page 333)  (10 points)
          (Assume the direction of rotation is not changed
           by the collision.)

       #4 FISHBANE - CHAPTER 10 - PROBLEM 7
 
         A rock of mass 60 g is thrown with initial horizontal velocity
         v_x = +25 m/s off a building from a height of 30 m.  Take UP
         to be the +y direction.  Calculate the angular momentum of the 
         rock about the line along the edge of the roof as a function 
         of time, in unit vector notation.  (5 points)

       #5 HALLIDAY AND RESNICK - 2ND Ed. - CHAPTER 12 - PROBLEM 25
         Two skaters, each of mass 50 kg, approach each other along
         parallel paths separated by 3.0 m.  They have opposite
         velocities of 1.4 m/s each.  One skater carries one end of
         a long pole with negligible mass, and the other skater grabs
         the other end of it as she passes.  Assume frictionless ice.
         (a) Describe quantitatively the motion of the skaters after
         they have become connected by the pole.  (b) What is the
         kinetic energy of the two-skater system?  Next, the skaters
         each pull along the pole so as to reduce their separation to
         1.0 m.  What then are (c) their angular speed and (d) the
         kinetic energy of the system?  (e) Explain the source of the
         increased kinetic energy.  (10 points)