Question

The direction of acceleration due to gravity is

Answer 1

To solve this question we at first need to know what actually gravity is and what type of characteristics it exhibits. By which unit it is represented and how is it represented mathematically. Then only we can know what is acceleration due to gravity and how it implements in life.
Formula used:
${{F}_{g}}=\dfrac{G{{m}_{1}}{{m}_{2}}}{{{r}^{2}}}$
F = ma.

Complete answer:
We must understand that in this universe, there are a lot of forces. An object unknowingly always tends to push or pull some other object. There are four fundamental forces from which each and every other force is derived those are weak force, gravitational force, strong force and the electromagnetic force.
So, as we know, gravity is actually the force with which earth tends to attract a mass towards itself.
We can also say that gravitational force is a force which attracts any two objects with the mass. This force always tends to pull two or more masses together; this force never pushes any object apart. This phenomenon can be understood by Newton's universal laws of gravitation.
Now, to represent this mathematically newton provided an equation that is,
${{F}_{g}}=\dfrac{G{{m}_{1}}{{m}_{2}}}{{{r}^{2}}}$.
The unit of gravitational force is Newtons(N).
Now this is gravity and by acceleration due to gravity we understand that the acceleration that is the actually the free fall of an object in vacuum and obviously without a drag.
Acceleration due to gravity can be mathematically shown by many formulas, but one of them is, F = ma or a = F/m.
Acceleration is the reason for which a car constantly gains its speed while traveling.

Note:
In the formula ${{F}_{g}}=\dfrac{G{{m}_{1}}{{m}_{2}}}{{{r}^{2}}}$. ${{F}_{g}}$ is actually referring to the gravitational force between two objects, ‘G’ is known as the gravitational constant, which has a value of $6.67\times {{10}^{-11}}N\cdot {{m}^{2}}/k{{g}^{2}}$ , ‘r’ is the distance between the objects in meters, ${{m}_{1}}$ refers to the mass of the first object whereas ${{m}_{2}}$ refers to the mass of second object. To solve this question one must know the definition and the concept of gravity. In the equation F = ma, F is the force, ‘m’ is the mass of the body and ‘a’ is the acceleration due to gravity.