Energy Stores Flashcards
(21 cards)
What are energy stores?
Different ways of storing energy
How many energy stores are there to know?
Eight
What type of energy store does anything moving have?
Kinetic energy store
What happens to the energy in the kinetic energy store when an object speeds up?
Energy is transferred to this store
What happens to the energy in the kinetic energy store when an object slows down?
Energy is transferred away from this store
What factors determine the energy in a kinetic energy store?
Mass and speed of the object
How does doubling the mass affect the kinetic energy?
It doubles the energy
How does doubling the speed affect the kinetic energy?
It quadruples the energy
What is the formula for calculating kinetic energy?
KE = ½ × m × v²
What is the kinetic energy of a car with a mass of 1450 kg traveling at 28 m/s?
570,000 J (to 2 significant figures)
What type of energy store does an object at height have?
Gravitational potential energy store
How can you calculate the change in gravitational potential energy?
AGPE = m × g × Δh
What does ‘m’ represent in the gravitational potential energy formula?
Mass (kg)
What does ‘g’ represent in the gravitational potential energy formula?
Gravitational field strength (N/kg)
What does Δh represent in the gravitational potential energy formula?
Change in vertical height (m)
True or False: The hotter an object is, the more energy it has in its thermal energy store.
True
What type of energy store is associated with chemical reactions?
Chemical energy store
What type of energy store is related to stretched materials like springs?
Elastic potential energy store
What type of energy store involves charges that attract or repel each other?
Electrostatic energy store
What type of energy store involves magnets that attract or repel each other?
Magnetic energy store
What type of energy store involves atomic nuclei releasing energy?
Nuclear energy store
