accelerating by gravity造句

The reason is that it is being constantly accelerated by gravity . ( Ranking : 8)
He showed that the bodies were accelerated by gravity to an extent that was independent of their mass and argued that objects retain their velocity unless acted on by a force, for example friction.
If you change the motion of a charged particle it experiences a force due to the delay in updating its own field, and I think this could be described as " laboring up its own potential well " . ( This force is called the " self-reaction " or " back-reaction ", and Wikipedia doesn't seem to have a good article about it . ) But that doesn't matter when the particle is being accelerated by gravity, because everything gravitates equally, including fields.
It's difficult to find accelerating by gravity in a sentence. 用accelerating by gravity造句挺难的