Table of Contents

**Gravitation could be a Universal Law:**

G(m₁m₂/d2) = F

G is that the universal gravitational constant= 6.673 x 10⁻¹¹ Nm²/kg².

**Gravity’s Acceleration**

GM/R2 = g

G is that the G.

M denotes the Earth’s mass.

R denotes the Earth’s radius.

The equation for acceleration thanks to gravity is independent of the object’s mass (m). If two bodies of various masses are liberated to fall, they’re going to both fall with identical acceleration.

**Gravity-Induced Acceleration Variation (g)**

As we go from the equator to the pole, the worth of g rises

**The Laws of Kepler**

**Kepler’s first law**

**(law of elliptical orbit)**states that every one planet will rotate in an elliptical orbit around the Sun, with the Sun at one focus.

**The second law of Kepler (law of areal velocities)**is defined as that a line starting from the Sun and ending on any planet will cover an equal area of space in equal time intervals.

dAdT = L2m

L momentum ( here L is constant)

m is mass

**Kepler’s third law (law of period)**states that the square of any planet’s period of revolution around the Sun is precisely proportional to the cube of the distance from the Sun.

a3T2= G(M+m)4π2

**Field of Gravitation**

Gravitational Field Intensity vs. force field Strength

The force experienced by the unit mass put at any position in an exceeding field gives the field strength at that time. it’s aimed toward the particle that generates the sphere.

**Potential Gravitational**

V = – Wm

**Satellites**

**Satellite within the Sky:**A natural satellite could be a heavenly body that circles the world. The moon, as an example, could be a natural satellite of the world.

**Man-Made Satellite:**Artificial satellites are man-made entities that are positioned in specific orbits and designed to rotate around the Earth.

**Geostationary Satellite (Geostationary Satellite):**A geostationary satellite revolves around the planet with the identical angular velocity and within the same direction because the Earth’s axis

**Properties of attraction**

**The properties of attraction are as follows:**

- Gravity is taken into account as a long-range force that exists between two objects without considering the medium that separates them.
- The gravitation is directly proportional to the merchandise of the mass of the 2 objects. This states that an item with a bigger mass will yield a bigger force.
- The force follows the inverse square law. The gravitational attraction is inversely proportional to the square of the gap between the 2 objects; the larger the space, the less is that the force.
- On the surface of the world, gravity produces a continuing acceleration that’s calculated to be g= 9.8 m/s2.
- The attractive force has always been a force of attraction that always attracts two objects together and never pulls them aside from one another.
- The gravitational attraction is usually independent of the separating medium.
- Among the four fundamental forces, attraction is the weakest of them.
- Gravity always acts along the road which joins the centre of the 2 objects, which is why it’s called the central force.
- The gravitational attraction is directly proportional to the burden of the objects.
- The attractive force also acts whether or not the objects don’t seem to be in physical contact.

**FAQs**

##### When thrown from an identical height, why does a corpse reach the bottom faster near the poles than the equator?

Gravitational acceleration is bigger near the poles than at the equator. As a result, when an object is dropped from the identical height at the poles and also the equator, the item hits bottom faster at the poles than at the equator. If the starting velocity and distance travelled by the item are identical, the time required to achieve the planet is less if the acceleration, thanks to gravity, is bigger.

##### What's the history of gravitational theory?

The history of theory of gravitation is: Ptolemy proposed a geocentric model that did not explain planetary motions, which led to the event of the heliocentric model by Nicholas Copernicus, whose idea is predicated on the rotation of a test mass round the source mass in circular orbits, although the model correctly predicts the position of planets and their motions but fails to elucidate many aspects like the occurrence of seasons, which led to the development of a model.