Question

explain the term free fall and state the corresponding kinematical equations of motion in the usual notation ​

Answer 1

Answer:

Imagine an object body is falling freely for time t seconds, with final velocity v, from a height h, due to gravity g.

...

The formula for free fall:

h= 1 2 g t 2 \frac{1}{2}gt^2 21gt2.

v²= 2gh.

v=gt.

Answer 2

When a body falls in air, there are three forces acting on the body:

$\sf\blue\bigstar$ the gravitational force due to the earth, acting downward.

$\sf\blue\bigstar$ the force of buoyancy (upthrust) due to air, acting upward

$\sf\blue\bigstar$ the force due to friction with air (called air resistance), acting upward (being always in the direction opposite to that of the body).

under certain conditions, the force of buoyancy due to air and friction with air can be ignored compared to the gravitational force of the earth. in that case (near the earth's surface) the body falls with almost uniform acceleration (g). Whenever a body moves under the influence of the force of gravity alone, it is said to be falling freely. Strictly speaking, this is true only if the body falls in vacuum.