The correct statement is

1. Both work and energy have the same units
2. Potential energy of a body is due to its motion
3. Kinetic energy of a body is due to its position or state
4. Kinetic energy can change into potential energy, but potential energy cannot change into kinetic energy

According to law of conservation of energy, energy changes from one form to another form, but the total energy of that system

1. increases
2. decreases
3. alternates
4. remains the same

State the unit of energy and define it?

Name five different forms of energy.