Earphone definition, a sound receiver that fits in or over the ear, as of a radio or telephone. See more.
Answer Wiki. If a rocket went straight up, it would either continue in that direction and leave Earth, or it would fall back down, depending on its velocity. Most rockets intend to enter orbit, which is an elliptical trajectory, and it's much more efficient to arc into this trajectory than to go straight up and then accelerate laterally.
So Why Donât Rockets Take Off Like Airplanes? Now that you know all about escape velocity and the importance of making it into orbit really fast, itâs quite simple to understand why rockets donât take off like airplanes do from a runway. There are a few reasons behind it, primarily that an airplane does not go any faster than 500-600 mph.