Gravity is a force of attraction that exists between any two masses, any two bodies, any two particles. Gravity is not just the attraction between objects and the Earth. It is an attraction that exists between all objects, everywhere in the universe. ... where G is called the Gravitational Constant.
The force that attracts masses, bodies, particles, objects to one another is what is referred to as force of gravity. This description describes gravity as the attraction between objects and the earth.
But that's not all what gravity is all about.
Gravity also refer to the attraction that exists between all objects, everywhere in the universe.
When the only force that applies on a body is the force of gravity (for example object in free fall), the acceleration of that body is acceleration due to gravity; this is represented by g and it's equivalent to 9.8m/s² on earth.
One thing to note is that, all objects (regardless of their mass) have the same acceleration when in a state of free fall.
The impression of the image on the retina lasts for about 1/16th of a second after the removal of the object. If a burning stick of incense is revolved at a rate of more than sixteen revolutions per second, we see a circle of red light due to persistence of vision.
Newton's second law states that the acceleration of an object is directly related to the net force and inversely related to its mass. Acceleration of an object depends on two things, force and mass.