Why do bodies thrown horizontally fall to the ground? What force is called gravity?

1. Why do bodies thrown horizontally fall to the ground? 2. What force is called gravity? How is it designated? 3. Why is the force of gravity somewhat greater at the poles of the Earth than at the equator and other latitudes? 4. How does gravity depend on mass? 5.How is gravity directed?

1 A body thrown horizontally falls to the ground under the action of gravity Fт.

2 Between all bodies, according to the law of universal gravitation, a force of mutual attraction F arises, which is determined by the formula: F = G * m1 * m2 / R ^ 2, where G is the universal gravitational constant, m1, m2 are the masses of interacting bodies, R is the distance between bodies.

3 The force of gravity Fт is the force of universal gravitation, which acts on the bodies located on its surface.

Ft = G * m * Mz / Rz ^ 2, where Mz is the mass of the earth, Rz is the radius of the earth.

The value G * Ms / Rs ^ 2 was called the gravitational acceleration g.

The force of gravity is determined by the formula: Ft = m * g, where m is the mass of the body, g is the acceleration of gravity.

g = 9.8 m / s ^ 2.

4 Since the earth has the shape of a flattened ball from the poles, the distance from the center of the earth to the poles Rп is less than the distance from the center at the equator Re.

Since the radius is in the formula for the force of gravity in the denominator, then the force of gravity at the equator is less than the force of gravity at the poles

G * m * Ms / Rp ^ 2> G * m * Ms / Re ^ 2.

The force of gravity Ft is directly proportional to the body mass m: Ft = m * g.
Gravity Ft directed towards the center of the earth.