what do you mean by kinetic energy
The energy possed by a body when it is in motion is its kinetic energy.
kinetic energy of a body depends on its mass and its speed.
KE = 1/2(mv2)
where m = mass of the body
v = speed of the body
SI of kinetic energy is same as that of energy ie JOULS(j) and its derived unit is kg.m2 s-2