In addition to the problems from the book (7.E.42, 7.P.9, 6.R.19, 6.R.22, 6.R.23, 6.E.8, 6.E.12, 6.E.43, 6.P.6, 6.P.12, 8.R.29, 8.E.47, 8.P.9), the following questions are a required part of the homework assignment that is due on May 9. (See also 6.E.23 and 6.E.26, though these are not part of the formal assignment.)

1. If a 75 kilogram hero wielding a 5 kilogram gun shoots an 80 kg villain with a single bullet, and this villain flies back with a velocity of 5 m/s (enough to break and fly through a window, for instance), what conservation principle is relevant, and what does this mean about the hero's velocity after firing the shot? A realistic (large) bullet has a mass of 10 grams, and travels at maybe 400 m/s. What should the villain's speed have been after impact?
2. Often you'll see spaceships bank to affect a turn, as an airplane might. But in space there are no aerodynamic forces acting on the wings, so banking doesn't produce a turn in space. Equipped only with rocket thrusters, what must a spaceship do to make a right turn? There may be several ways to skin this cat.

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