However, it's important to remember that "downwards" is relative to the Earth's surface.

* When a plane is flying horizontally: Gravity pulls the plane downwards, but the plane's wings generate lift to counteract this force, allowing it to stay aloft.

* When a plane is taking off or landing: Gravity is still pulling the plane downwards, but the plane's engines provide thrust to overcome this force.

So, even though the plane is moving, gravity always acts in a downward direction relative to the Earth's surface.