AQA GCSE PHYSICS ENERGY FINAL PAPER
COMPLETE QUESTIONS WITH CORRECT
ANSWERS ALREADY PASSED
●● What is meant by conservation of energy?
Answer: Energy cannot be created or destroyed, only transferred or
stored.
●● What is a system in physics?
Answer: An object or group of objects.
●● What is a closed system?
Answer: A system where no energy enters or leaves.
●● Name the main energy stores.
Answer: Thermal, kinetic, gravitational potential, elastic potential,
chemical, magnetic, electrostatic and nuclear.
●● What is meant by an energy transfer?
Answer: The movement of energy from one store to another.
●● What are the four ways energy can be transferred?
,Answer: Mechanically, electrically, by heating and by radiation.
●● What is kinetic energy?
Answer: The energy an object has due to movement.
●● What is the equation for kinetic energy?
Answer: KE = 0.5 × m × v²
●● What is the unit of kinetic energy?
Answer: Joules (J)
●● What happens to kinetic energy when speed doubles?
Answer: It quadruples.
●● What is the equation for gravitational potential energy?
Answer: GPE = m × g × h
●● What does g equal on Earth?
Answer: 9.8 N/kg
●● What is elastic potential energy?
Answer: Energy stored when an object is stretched or compressed.
, ●● What is the equation for elastic potential energy?
Answer: E = 0.5 × k × e²
●● What does k represent?
Answer: Spring constant in N/m
●● What does e represent?
Answer: Extension in metres
●● What is work done?
Answer: Energy transferred when a force moves an object.
●● What is the equation for work done?
Answer: Work done = force × distance moved in direction of force
●● What is the equation for power?
Answer: Power = energy transferred ÷ time
●● What is an alternative equation for power?
Answer: Power = work done ÷ time
COMPLETE QUESTIONS WITH CORRECT
ANSWERS ALREADY PASSED
●● What is meant by conservation of energy?
Answer: Energy cannot be created or destroyed, only transferred or
stored.
●● What is a system in physics?
Answer: An object or group of objects.
●● What is a closed system?
Answer: A system where no energy enters or leaves.
●● Name the main energy stores.
Answer: Thermal, kinetic, gravitational potential, elastic potential,
chemical, magnetic, electrostatic and nuclear.
●● What is meant by an energy transfer?
Answer: The movement of energy from one store to another.
●● What are the four ways energy can be transferred?
,Answer: Mechanically, electrically, by heating and by radiation.
●● What is kinetic energy?
Answer: The energy an object has due to movement.
●● What is the equation for kinetic energy?
Answer: KE = 0.5 × m × v²
●● What is the unit of kinetic energy?
Answer: Joules (J)
●● What happens to kinetic energy when speed doubles?
Answer: It quadruples.
●● What is the equation for gravitational potential energy?
Answer: GPE = m × g × h
●● What does g equal on Earth?
Answer: 9.8 N/kg
●● What is elastic potential energy?
Answer: Energy stored when an object is stretched or compressed.
, ●● What is the equation for elastic potential energy?
Answer: E = 0.5 × k × e²
●● What does k represent?
Answer: Spring constant in N/m
●● What does e represent?
Answer: Extension in metres
●● What is work done?
Answer: Energy transferred when a force moves an object.
●● What is the equation for work done?
Answer: Work done = force × distance moved in direction of force
●● What is the equation for power?
Answer: Power = energy transferred ÷ time
●● What is an alternative equation for power?
Answer: Power = work done ÷ time
