upward force meaning in English

向上力

Let p represent the upward force exerted on the ball by the man in the throwing process .
令P为抛球时人手作用于球而向上的力。
Let p represent the upward force exerted on the ball by the man in the throwing process
令p为抛球时人手作用于球而向上的力。
The upward force of a liquid is called buoyancy , which can keep some objects up
液体向上的力称为浮力，它能使某些物体不沉下去。
The spinning of the propellers generates the necessary lift , or upward force , to raise the platform
螺旋推进器快速旋转，生成必要的上升力，使平台升起。
Any body above the earth will fall unless it is supported by an upward force equal to its weight
地球上的任何物体都会落下来，除非它受到一个大小与其重量相等的力支持。