Changes in Energy Flashcards

All 5 cards in this deck

What does the principle of conservation of energy say about a closed system?

Energy can be transferred, stored or dissipated, but there is no net change to the total energy of the system.

What are the three ways the energy of a system can be changed?

By work done by forces, in electrical equipment, and in heating.

Which of the three ways of changing a system's energy is involved when a crane lifts a load?

Work done by a force (the lifting force moves the load).

Which energy store empties and which fills as a ball thrown vertically upwards rises?

Energy is transferred from the kinetic store of the ball to its gravitational potential store.

True or false? In a closed system, energy is destroyed when it is dissipated to the surroundings.

False. The total energy stays the same; it is just stored in less useful ways.