Conservation and dissipation of energy Flashcards
Work done
Energy is transferred
Conservation of energy law
Energy cannot be created or destroyed, it can only be transferred from one form to another
Gravity
Force of attraction between 2 objects
Kinetic
Energy it possesses due to its motion
What happens to an objects kinetic energy as it rises?
converts into gravitational potential engery
What happens to an objects GPE as it falls?
Converts into kinetic energy
Conservation of energy principle
Energy can transfer usefully, stored or dissipated, but never created or destroyed
What are the 8 energy stores?
- thermal
- kinetic
- nuclear
- electrostatic
- magnetic
- elastic
- chemical
- gravitational potential
What does it mean if a system changes?
energy has been transferred
What is meant by the term ‘closed system’?
Neither matter nor energy can enter or leave from the outside world
- overrall energy change is 0
What are the 5 ways energy can be transferred
- mechanically
- electrically
- heating
- radiation