What is the copernican principle? make a list of scientific discoveries that confirm it.

The Copernican principle is the idea that Earth and the Sun are in no way specially favored bodies in the universe. it is confirmed by the following:

1. Earth orbits the Sun and is not the center of our solar system.

2. The Sun is part of billions of other stars in the Milky Way Galaxy and is not in any central position.

3. The Milky Way Galaxy is part of billions of other galaxies in the universe and planets are commonly found orbiting other stars.

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.