obtain the equation of a body said to be " under free fall"
Answers
Velocity and gravity are closely interlinked. Motion under gravity is classified under motion in a straight line or motion in one dimension.
Velocity of an object falling under the force of gravity always increases.
Motion of an object falling under gravity is often given by equations of motions that connect initial velocity (often written as Vo), final velocity (V) that is after time t, time of travel (t), acceleration due to gravity (denoted by g) that the object is undergoing and displacement, often written as Y - Yo where Y is the position of the object after time t and and Yo is the position of the object at initial time.
There are 3 equations that are often used to understand this
V= Vo + g*t
X - Xo = Vo*t + 1/2* g* t(sq)
V(sq) = Vo(sq) + 2 *g* (X-Xo)
The velocity will become constant if “g” becomes zero. In-fact if you substitute the value of “g” as zero in equation 1 and 3 you’ll find V does not change
Each of these equations have a logical derivation. I suggest you have a look at this video (and the ones that follow) to understand this topic better.