It turns out the mathematics gets very complicated, very fast.
(i) A has only recently begun to feel comfortable predicting B’s path, B’s behavior, her perturbations and eccentricity of orbit. And now this, he thinks. Another body.
(j) B screams with the agony of natural childbirth. She looks into A’s eyes. What is he thinking, her A, her odd, impenetrable husband? Will he make a good father?
(k) A thinks generally about the concept of pain. A has a witty thought and would like to write it down.
7. MOMENT OF INERTIA
(a) A and B are not moving (VA = VB = 0). A is in his study, hidden in the corner. He is talking in a low voice.
(b) B, across the house, is watching television.
(c) A is talking to J, who is married to S. S is a good friend of A.
(d) J is thinner than B. S is older than A.
(e) B is listening to A. S is listening to J.
(f) Also listening: the neighborhoods Theta and Sigma, Delta and Phi.
(g) Also listening: the social circle: Phi, Chi, and Psi. Eta, Zeta, and Nu. Even Lambda has been known to listen.
(h) Others, just speculating, say that A and J would make a good-looking couple. A says no, thinks yes. J blushes.
(i) S exerts a force on J. A exerts a force on B. A wants to exert a force on J, and J would like it if A would exert a considerable force on her.
(j) B is walking down the hall. A can hear B. B can hear A’s voice growing softer with each step she takes. A freezes in anticipation, ready to hang up the phone.
(k) B changes velocity, turns, goes into the kitchen, pretending not to hear.
(l) A does not move. B does not move. The forces cancel out. Everyone remains at rest.
8. PARTIAL SOLUTIONS
(a) renovate the kitchen;
(b) renovate themselves;
(c) go on safari;
(d) go to a “seminar”;
(e) make large purchases of luxury durable consumer goods;
(f) make small overtures to an object of lust at work;
(g) take up golf;
(h) find a disorder and self-diagnose;
(i) get a purebred dog;
(j) get religion;
(k) landscape the backyard;
(l) have another child.
9. GEDANKENEXPERIMENT
(a) Imagine A is building a spaceship. He is tired of being pushed, pulled, torqued, accelerated, collided on a daily basis. Losing momentum. He is tired of his thesis failing, time and again. Every day an exception to A’s Theorem. Every day he recognizes it a little less—once a shiny unused tool, a slender, immaculate volume. Now riddled with holes, supported with makeshift, untenable assumptions. A’s Theorem has not so much predicted the future with success as it has recorded a history of its own exceptions.
(b) It is simplest to approach the problem of satellite motion from the point of view of energy.
(c) Every night for a year, A and B eat dinner in silence. Every night for a year, A lights a cigarette, opens a beer, goes to the garage to work on his imaginary spaceship. Sometimes, he has doubts. Sometimes, he gets frustrated, wondering if it is worth all the imaginary trouble.
(d) And then, one day, A finishes his spaceship. Even imaginary work pays off.
(e) A turns on his imaginary vehicle, listens to it roar. It makes a lot of imaginary noise. B tries to talk over it, but the engine is deafeningly loud.
(f) B shouts at A right in front of his face. A sees B gesturing wildly. Why is she acting so crazy?
(g) The energy of a body in satellite motion is the sum of its kinetic and potential energies. It is given by the following:
E=K+U=1/2mv2-GmN/r2
(h) A watches B moving frantically around the garage. A notes that B looks rather desperate, as if she is trying to stop him, trying to hold him, trying to keep him from leaving Earth.
(i) A’s spaceship is heating up. It is time, he thinks. He holds the imaginary levers and calculates his trajectory. He enjoys for a minute the low
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