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In this paper, I introduce general equation of conics sections based onphysical problem on the earth surface in [1]. The conics sections here(hyperbola and ellips) are generated by all maximum points of parabolas. Basedon it, I derived them to calculate the velocity and kinetic energy fordifferent types of conics. The main results showed that there is imaginaryvelocity if type of conics is hyperbola for r=0, but kinetic energy never beimaginary, only be negative value if r=0. Mean while, if types of conics isellipse, then the velocity is real and kinetic energy always be positive. It ismathematically unique because only imaginary mass based on special relativitythat can produce negative energy

The imaginary and real velocity of an orbiting body based on different types of conics sections