PROBLEMS NOT FROM GIAMBATTISTA
                               
        CHAPTER 5
        A1. Wendy is riding on a Ferris wheel, which turns once
            every three minutes.  Wendy's seat is 8.0 m from the
            central axle of the wheel, and that axle is 10.0 m
            above the ground.  When Wendy is at the top of the
            turning wheel, she drops a golf ball, which falls to
            the ground.  Relative to a vertical line from the
            release point to the ground, where does the ball land?

        CHAPTER 8
        A2. Refer to Giambattista Ch. 8, problem 79.  The radius
            of the pulley is R.  Instead of finding the 
            acceleration of the blocks, find the speed of the
            blocks after m_2 has fallen h meters.  Use
            conservation of energy.

        A3. A square, 20 cm on the side, is made of very light
            sticks.  Four identical masses of m = 0.1 kg form the
            corners of the square.   The square rotates with an
            angular velocity of 8 rad/s about an axis perpendicular
            to its plane through the center of the square.
            (a) Calculate the rotational inertia of the system
            about the rotation axis and use it to find the angular
            momentum about this axis.  (b) Use the general
            definition of angular momentum to calculate the
            angular momentum of each mass with respect to the
            center of the square, and add these up.  Compare the
            results of (a) and (b).

        A4. A child of mass 25 kg stands at the edge of a rotating
            platform of mass 150 kg and radius 4.0 m.  The platform
            with the child on it rotates with an angular speed of
            6.2 rad/s.  The child jumps off in a radial direction.
            (a) What happens to the angular speed of the platform?
            (b) What happens to the platform if, a little later, the
            child, starting at rest, jumps back onto the platform?
            (Treat the platform as a uniform disk.)