Question

What do u mean by kinetic energy??

Answer 1

Energy possessed by molecules due to motion is called kinetic energy

Answer 2

   Kinetic energy is the form of energy that a body having a mass m has when it is in motion or moving.
  Kinetic energy is given by KE = 1/2 * m * v^2 
    where m = mass   and v = instant velocity of the body.

 Kinetic energy is a scalar quantity.  It is an instantaneous quantity.