Newton's cannon is
a thought process
experiment that Isaac
Newton used to explain
that the force of gravity
was universal.
If we fire a cannon
horizontally from a high
mountain, the cannon ball
accompagnement
numérique
will fall to Earth because of the gravitational force.
With a higher velocity, it will travel further before
returning to the Earth.
With the right velocity, the projectile would travel
completely around the Earth, always falling with
gravity but never reaching the Earth: the cannon
ball would have been put into orbít around the
Earth. Newton concluded that the orbit of the
Moon was of exactly the same nature.

1. Why does a projectile fall to Earth?
2. What happens if its velocity is sufficient?
3. What does Newton's cannon experiment explain?