Round 2: Tossup 11

If this statement holds, the standalone M1, M2, and M3 terms on the right-hand sides of Euler’s equations all vanish to zero. Universally, this statement is implied by the fact that all four fundamental forces are central forces. Precession that is not “induced” (-5[1])by a force (15[1])occurs because this (-5[1])statement holds while the direction of omega changes. Isaac Newton showed that this statement implies orbits sweep out equal (*) areas (10[1])in equal times in his proof of Kepler’s (10[1])second law. This statement, which holds for systems with no net external torque, (10[1])explains why ice skaters spin faster upon drawing in their arms. (10[1])For 10 points, name this law stating that the quantity “I omega” stays constant. ■END■ (10[1])

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