• acceleration due to gravity:When an object falls freely towards the surface of the earth from a certain height, then its velocity changes. This change in velocity produces acceleration in the object which is known as acceleration due to gravity denoted by the letter g. The value of acceleration due to gravity is g= 9.8 m/s².
• weightlessness: Weightlessness, a condition experienced while in free-fall, in which the effect of gravity is cancelled by the inertial (e.g., centrifugal) force...

The importance of gravity force are as follows:

• The gravitational force of the earth keeps us bound to the earth
• The gravitational force between the sun and the earth makes the earth go around the sun.

When the masses of two objects is doubled, then the gravity between them is quadrupled; and so on. Since the gravitational force is directly proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitation forces.

A body weighs more at the poles than in the equator because the gravitation is more at the poles than in the equator.

Both coin and feather will reach the ground at the same time because air resistance is the only hindrance an object may suffer through falling.

Universal constant 'G' can be defined as the force of gravitational product between two bodies of unit mass each, separated by the unit distance between their centres. The SI unit of G is Nm²kg^-2. Its value is 6.67*10^-11Nm²kg^-2.

Newton's law of gravitation is usually stated as that every particle in the universe has a force directly proportional to the product of their masses and inversely proportional to the distance between their centres.

The role of physics and chemistry is really important and I am just going to give you a few examples which you are quite familiar with and those being gravity and food. Now, you see gravity is a part of physics and food is a part of chemistry but the not so difficult part is about them being co-related to each other so well physics deals with the basic principles that explain matter as substance and energy and may study aspects of atomic matter by following concepts derived from the most...

The universal force of attraction acting between all matter is called gravitation. The factors that affect gravitation are only mass and distance. Its SI unit is Newton's per Kilogram.

The weight of a body is less in the mines because when we move deeper the earth gravity decreases but our mass is always constant.