What causes asteroids and meteoroids to fall out of orbit from the Asteroid Belt?

The anisotropic emission of thermal photons.

Hope that helps.

Gravitational forces from other objects in the Solar system affect the orbits of some asteroids enough that they fall toward the Sun and out of the Asteroid belt in just the same way When Jupiter or Saturn's gravitational Fields grab an asteroid and make a moon for several million years or more. Gravity is NOT the answer. Gravitational influences or forces from other solar system bodies is the right answer. My answers are usually correct,

YA is NOT a contest for your amusement to see who can com up with correct answers the most quickly. That's a misuse of YA as a stage to annoy and harass and exploit the YA community, That's a serious violation of the Community Guidelines.

A Mixture of gravity from Jupiter and the sun can cause objects to be flung out of the belt. Also collisions from objects inside the belt can cause some to be ejected.

I believe the main reason is due to the Titius Bode Law, which causes planets to be formed at certain distances from the sun, but due to Jupiter being so massive and the suns gravity, nothing much could form in the region between Mars and Jupiter. The largest object is Ceres, but the continual pull from jupiter and the sun stopped it from accreting from a collection of planetesimals into a planet. The continual tug of war and rare alignments with other planets increase the gravitational pull which can fling objects out.

What Color Is The Asteroid Belt

Chaos theory

There are no exact answers to the N-body problem. The effect of gravitational fields from multiple bodies such as Jupiter, the sun and other asteroids is chaotic and can eject asteroids from stable orbits.

Mostly asteroids do not fall out of the belt.

But if two asteroids pass close enough to each other their mutual gravitational interaction could fling one or both of them out of the belt. Gravitational interactions with Jupiter can do that too. Also if two asteroids collide some of the debris could be thrown out of the belt.

I would guess a combination of gravity, inertia and lack of speed. Gravity pulls, the inertia of the sun makes them go to it instead of the other way around and their slow speed does not give them enough energy to work against the gravitational pull of the sun. Therefore they eventually will be forced from the Ateroid belt.

Just a guess but it sound logical to me.

comet- an enormous chunk ice in space asteroid- a huge chunk of metal in space meteoroid- a rock in space meteor- a meteorite burning in an atmosphere meteorite- a rock from space that has fallen through the atmosphere

Gravity.

Perturbations. Ask Otis Mathis. He knows all about perturbation.