net gravitational force造句

In free fall, ( no net gravitational forces ) objects lack weight but retain their mass.
This accounts for why you don't feel any net gravitational force inside a hollow sphere.
With a spherical shell, there is no net gravitational force on the sun due to the shell.
By symmetry, the net gravitational force attracting a mass point towards a homogeneous sphere must be directed towards its centre.
:: Don't forget Gauss'law for gravity There's probably enough material to create a net gravitational force inward.
It's difficult to find net gravitational force in a sentence. 用net gravitational force造句挺难的

This phenomenon is a gravitational wave; it is not entirely clear what mechanism allows such a fluctuation in observed net gravitational force to exist.
Now, yes, quite correct, the net gravitational force is the vector sum of all the little gravitational forces from everything in the observable universe ( and the " big " gravitational force from the sun ).
If it's a slow rotator, then as long as you're within a hollow spherical chamber, you're fine; there can be no net gravitational force at any point in the chamber, and so no tidal forces.
Each air molecule is feeling a net gravitational force towards the denser regions of the earth's crust-the molecules therefore move in that direction-the increase in the number of molecules arriving at that location will increase the pressure of the air until such time as the force due to the excess air pressure pushing outwards equals the excess gravity pulling inwards.