Kinetic energy is the energy possessed by a body by the virtue of its motion.
It can be mathematically written as,
K.E.= 1/2 mv²,
where, m is the mass of the body in motion
v is the velocity with which the body is moving
K.E. is an abbreviation of kinetic energy.
Kinetic energy is usually measured in units of Joules (J); one Joule is equal to 1 kg m² / s².
Hope it helps :)
All the best!