# DAV Class 6 Science Chapter 10 Notes – Work and Energy

These DAV Class 6 Science Notes and DAV Class 6 Science Chapter 10 Notes – Work and Energy act as excellent revision resources, particularly in preparation for board exams.

## Work and Energy Class 6 DAV Notes

→ Work: When a force: acting on a body: causes some displacement in the body, it is said that the work is done.

→ If F is the force and S is the displacement, then work done can be given as follows:
W = F × S

→ Energy: The capacity to do work is called energy.

→ Mechanical Energy: The energy possessed by an object is called mechanical energy; which can be in the form of potential energy or kinetic energy.

→ Potential Energy: The energy possessed by an object because of its position is called potential energy. For example; a stone which is kept at a height can break something if it falls on something. This would happen because of the potential energy in the stone due to its position at a height.

→ Kinetic Energy: The energy possessed by an object because of its motion is called kinetic energy.

→ Heat Energy: The energy because of temperature of an object is called heat energy.

→ Chemical Energy: Certain substances produce energy because of some chemical reaction. Such form of energy is called chemical energy. For example; when a matchstick is rubbed against the matchbox, it produces fire because of a particular chemical reaction.

→ Light Energy: Light is one of the forms of energy and it is felt in the form of heat.

→ Sound Energy: We know that sound is produced because of vibrations in an object. So, sound is also a form of energy.

→ Electrical Energy: Electrical Energy is very important for us; to use almost all the modern gadgets and appliances.

→ Unit of force: Newton Unit of work: Newton metre

→ Law of Conservation of Energy: As per this theory, “Energy cannot be created and cannot be destroyed. We can only change the form of energy.”

→ Mechanical Energy: The energy possessed by an object; in the form of potential or kinetic energy; is called mechanical energy.

→ Electrochemical cell: A device which produces electricity because of some chemical reaction in it is called electrochemical cell.