Answer 1

• The energy of a body in motion is called its kinetic energy.
• It is defined as follows:
  Kinetic energy of a body is the energy possessed by it due to its state of motion. Actually, it is the work done on the body bringing it to the state of motion.
• In short form, it is written as K.E. or K.
• Example: In a swinging pendulum moving to and fro, the bob has the kinetic energy.