Toss Up - Physics - Short Answer
If a satellite moving in a circular orbit is raised to another circular orbit 3-times as far from the Earth's center and where the kinetic energy of the satellite is 3-times less, by what factor does the centripetal force on the satellite decrease?
ANSWER: 9
(Solution: F = mv /R, numerator times 1/3, denominator times 3; or use Newton's law of universal
gravitation, F proportional to 1/R )