Unfortunately, you neglected to include the list of allowable choices that "follows"
the question. Still, I know the answer.
The force that keeps comets in closed orbits around the sun is the one that has
the same effect on the planets; gravity. The only difference is that the orbits
of the long-term comets are much more 'eccentric' (long and skinny) than those
of the planets, so they have much shorter minimum distances from the sun, and
much longer maximum distances, than planetary orbits have.
So, the correct awnser is Gravity.
The force of gravity causes comets to reenter the inner solar system. Comets are kept on an orbital path by the gravitational pull of the Sun.
Friction
The Earth's gravitation.
look mass times acceleration equals potential gravity this causes rockets to launch
Gravity causes rock slides, layers of rock breaking loose and sliding down slopes.Gravity causes mutual forces of attraction between every two specks of mass.Anywhere. All the time.
The force that keeps asteroids moving through space is inertia. The law of inertia is that a body remains in its state of rest or uniformed motion unless acted upon by a force.
Comets have elliptical orbits as do planets, in general a comets orbit is more elliptical than a planets orbit. In some cases far more, insomuch as they are temporary visitors to our solar system. --- Comets are small bodies of rock and ice which are in a highly eccentric orbit around the sun. They spend most of their time slowly orbiting the sun, far out beyond the outer planets. Their orbit eventually brings them closer to the sun where they can then be seen more easily as the sun heats the surface and causes gas and dust to come away from the comet. Planets have much more regular orbits, their distance from the sun varies too, but to a much lesser degree. Planets orbits dont cross each others, and they are all on a similar plane. comets orbits are not always on the planetary plane and will cross the orbits of many planets throughout their eccentric orbit.
There is none. Both comets and planets are in free-fall, moving in accordance with their inertia and the gravitational forces between the Sun and the planet or asteroid.
Of course. That's how planets, comets, and moons are maintained in closed orbits around other masses.
Nothing fuels a comet. They are just ice balls orbiting the Sun forever (until they run into something). By the way, the tails of comets do not stream out behind them. The tails of comets always point away from the Sun.
Mobility Forces
gravity?
Friction is the force that causes static charge
unbalenced
Forces causes bonds to form
I would think by getting pulled into gravitational forces and being swung right back out into space.
There are two forces that causes an airplane to be airborne. They are Thrust and Lift. The other two forces resists the airplane's flight. They are Gravity and Drag.
Some is caused by magma following heat vectors within the body of the planet, and some is caused by tidal forces working on the earth from the outside.
gravity