Escape Velocity逃逸速度
If the kinetic energy of an object launched from the Earth were equal
in magnitude to the potential energy, then in the absence of friction
resistance it could escape from the Earth.
如果一个从地球发射的物体的动能在 magnitude 上等于势能,且在没有摩擦阻力的情况下,它就能脱离地球。
|
Index Energy concepts Gravity concepts 索引 能的概念 重力概念 | |||||
|
Go Back
返回 |
Orbit Velocity and Escape Velocity轨道速度与逃逸速度
If the kinetic energy of an object m1 launched from a planet of mass M2 were equal in magnitude to the potential energy, then in the absence of friction resistance it could escape from the planet. The escape velocity is given by 若物体 m₁ 从质量为 M₂ 的行星上发射,其动能等于势能,则在无摩擦阻力的情况下,它能够逃离行星。逃逸速度由下式给出
![]() To find the orbit velocity for a circular orbit, you can set the gravitational force equal to the required centripetal force. 要找到圆轨道的轨道速度,可以将引力设为所需的向心力。
![]() Note that the orbit velocity and the escape velocity from that radius are related by 注意,轨道速度与该半径处的逃逸速度之间存在关系
![]() |
Index Energy concepts Gravity concepts 索引 能的概念 重力概念 | ||
|
Go Back
返回 |