Question

what is energy? name the different types of energy ​

Answer 1

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Energy

• Energy is defined as the ability to do work.
• SI unit of energy or work = Joule (Nm) or Kgm/s².
• Energy has different forms: Light, heat, chemical, electrical or mechanical.
• W = F x s (work done = force × displacement )

Types of Energies

1. Potential energy
2. Kinetic energy
3. Heat energy
4. Chemical energy
5. Electrical energy
6. Light energy

Potential energy

• The energy possessed by a body due to its position or shape is called its potential energy.
• For example : Water stored in a dam has a huge amount of potential energy due to its height above the ground.
• P = mgh

Kinetic Energy

• It is the energy possessed by a body due to its motion.
• Kinetic energy of body moving with a certain velocity = work done on it to make it acquire that velocity.
• K = ½ mv²