AQA GCSE Physics Questions and Answers 2022/2023

AQA GCSE Physics Questions and Answers 2022/2023 System An object or group of objects (Electrical Circuit). Kinetic Energy Equation Kinetic Energy = 0.5 x mass x velocity² (0.5MV²). Elastic Potential Energy Equation Elastic Potential Energy = 0.5 x spring constant x extension² (0.5KE²). Gravitational Potential Equation GPE = mass x gravitational field strength x height (MGH). Power The rate at which energy is transferred or the rate in which work is done. Power Equation using Energy and Time Power = Energy Transferred / Time Power Equation using Work and Time Power = Work Done / Time What Can Happen To Energy It can be dissipated, stored or transferred but cannot be created or destroyed. Total Energy In A Closed System The total energy cannot change, only transferred, in a closed system. Definition Of Energy That Is Not The Desired Output (Eg. Heat From A Light) Waste Energy. Methods Of Reducing Unwanted Energy Lubrication or Thermal Insulation. Factors Affecting The Rate Of Cooling In A Building The thickness and thermal conductivity of the walls. Efficiency The amount of useful energy from the total input Efficiency Equation Efficiency (Total Useful Energy / Total Input Energy) x 100 Industrial Energy Generation Methods Fossil Fuels, Nuclear Fuels, Biofuel, Wind, Solar, Hydro-electricity, Geothermal and Tidal. Renewable Energy An energy resource that can be replenished as its being used.