HRW - CHAPTER 5 - from Problem Supplement #1
        66. A spaceship lifts vertically from the Moon, where the free-fall
            acceleration is 1.6 m/s^2.  If the spaceship has an upward
            acceleration of 1.0 m/s^2 as it lifts off, what is the magnitude
            of the force of the spaceship on its pilot, who weighs 735 N on
            Earth?

        FISHBANE - CHAPTER 4
        24. (The figure for this problem is HRW Fig. 5-27, on page 92. Only the
            masses are different.)  A force of magnitude 8.0 N pushes on a
            horizontally stacked set of blocks on a frictionless surface with
            masses m1 = 2.0 kg, m2 = 3.0 kg, and m3 = 4.0 kg.  (a) What is the
            acceleration of the stack?  (b) What are the forces on block 1, as
            well as the net force on this block.  (c) Repeat part b for block 2.
            (d) Repeat part b for block 3.

        26. Repeat problem 24, but this time with the blocks stacked in reverse
            order; that is, block 3 to the left and block 1 to the right.