GCSE Physics (AQA) 2022~2023 Rated A+

GCSE Physics (AQA) 2022~2023 Rated A+ P1 energy The ability to do work energy store a form of energy kinetic energy energy which a body possesses by virtue of being in motion gravitational potential energy energy an object possesses because of its position in a gravitational field thermal energy the internal energy present in a system due to its temperature elastic potential energy the energy stored in elastic materials as the result of their stretching or compressing emit to give off or send out absorb to take in conservation of energy The principle that energy cannot be created or destroyed closed system A system in which energy, but not matter, is exchanged with its surroundings. pendulum A hanging mass that swings back and forth when pulled to one side and let go. work (joules, J) Force x Distance, the exertion of force overcoming resistance or producing molecular change joules the SI unit of work or energy, equal to the work done by a force of one newton when its point of application moves one metre in the direction of action of the force force (newtons, N) A push or a pull Newtons the SI unit of force. It is equal to the force that would give a mass of one kilogram an acceleration of one metre per second per second kilograms the SI unit of mass, equivalent to the international standard kept at Sèvres near Paris mass (kilograms, kg) the quantity of matter which a body contains weight (newtons, N) the force exerted on the mass of a body by a gravitational field. metres (m) a measure of distance or displacement. time (seconds, s) the indefinite continued progress of existence and events that occur in apparently irreversible succession from the past through the present to the future. unit standards for measurement of physical quantities that need clear definitions to be useful precision refers to the closeness of two or more measurements to each other accuracy the degree of closeness of measurements of a quantity to that quantity's true value. friction the resistance that one surface or object encounters when moving over another. gravitational field strength (g) The force per unit mass experienced by a mass placed in a gravitational field. speed (meters/second, m/s) The distance an object travels per unit of time, Distance / Time spring constant (k) a parameter that is a measure of a spring's resistance to being compressed or stretched useful energy Energy converted by a device into the form(s) the device was designed for. wasted energy Energy converted by a device into the form(s) the device was NOT designed for. dissipate