| 单词 | Parabolic trajectory |
| 释义 |
Parabolic trajectory
原声例句
TED-Ed（视频版） A theory might invoke dominant and recessive genes to explain how brown-haired parents ended up with a red-headed child, or use gravity to shed light on the parabolic trajectory of a baseball. 一个理论可能会引入显性和隐性基因来解释为什么棕色头发的父母 会生出红色头发的小孩，或者运用重力来阐释棒球的抛物线轨迹。
英语百科
Parabolic trajectory![The green path in this image is an example of a parabolic trajectory.](/Images/godic/202502/01/OrbitalEccentricityDemo.svg0400.png") ![A parabolic trajectory is depicted in the bottom-left quadrant of this diagram, where the gravitational potential well of the central mass shows potential energy, and the kinetic energy of the parabolic trajectory is shown in red. The height of the kinetic energy decreases asymptotically toward zero as the speed decreases and distance increases according to Kepler's laws.](/Images/godic/202502/01/Gravity_Wells_Potential_Plus_Kinetic_Energy_-_Circle-Ellipse-Parabola-Hyperbola0400.png") In astrodynamics or celestial mechanics a parabolic trajectory is a Kepler orbit with the eccentricity equal to 1. When moving away from the source it is called an escape orbit, otherwise a capture orbit. It is also sometimes referred to as a C3 = 0 orbit (see Characteristic energy). |
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