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.