what is the formula of kinetic energy ?????
Answers
Kinetic Energy Formula
For the Kinetic formula, Ek, is certainly the energy of a mass, m, motion, of course, is v2.
Ek = 1/2 mv2
Ek = Kinetic energy
m = mass of the body
v = velocity of the body
Kinetic Energy Formula Derivation
Let us consider the example of an object of m which is at a state of rest on a table.
A force F acts on the object which moves it through a distance S.
The work done=F x S
W=Fnet x S——-(1)
Consider the work done on the object which results in a change in velocity from u to V. Furthermore, one must let “a” be the acceleration.
Considering the third equation of motion:
V²-u²=2as
s=V²-u²/2a———-(2)
Applying Newton’s Second law:
F=ma——(3)
From equation (1), (2) and (3)
W=ma*(V²-u²/2a)\=(1/2)m(V²-u²)
As the object in a state of rest, u=0
W=(1/2)mV²
Furthermore, the kinetic energy of a body moving with a certain velocity is equal to work done on the object. This work is for the purpose of acquiring that velocity from the estate of rest.
Therefore, Kinetic energy =1/2 mV²