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Home  >  Volume 27 (July 2014)

47. Review of the Effect of a Central-Force Problem on Planetary Motion by Mallam Nura Yakubu, Hayatu Abba Ibrahim and Nuhu Ibrahim.Volume27, (July, 2014), pp369 – 376
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This paper discussed the questions that people usually asked about the night sky. Why doesn’t the moon fall to the earth? Why do the planets move across the sky? Why doesn’t the earth fly off into space rather than remaining in orbit around the sun? The study of the effectsof central-force problem on planetary motion, ledus to understand that a satellite or planet would tend to go off in a straight line if no central force were applied to it. A central force makes the satellite or planet deviate from a straight line and orbit earth or sun. This attractive force (Central-Force) is the gravitational force between earth and satellite, planet and sun. Indeed, central force is the most important force on the scale of planets, stars, and galaxies. It is responsible for holding our earth to together and for keeping the planets in orbit about the sun, since many naturally occurring forces are central. Examples include gravity and electromagnetism as described by Newton’s Law of universal gravitation and coulomb’s law respectively.

Keywords:Central-force, Gravitational force, Orbit, Planet