The cards Question In terms of energy, what is work done? Tap to flip Answer The total amount of energy transferred. Question What is the equation for work done? Tap to flip Answer Work done = force × distance moved in the direction of the force (W = F × s). Question In what unit is work done measured? Tap to flip Answer The joule (J). Question When is work done on an object? Tap to flip Answer Whenever a force makes the object move. Question How many joules make one kilojoule? Tap to flip Answer 1000 joules. Question What does the law of conservation of energy state? Tap to flip Answer Energy cannot be created or destroyed, but it can be transferred. Question What is power? Tap to flip Answer The rate at which work is done. Question What is the equation for power in terms of work done? Tap to flip Answer Power = work done ÷ time (P = W ÷ t). Question In what unit is power measured? Tap to flip Answer The watt (W). Question How many watts make one kilowatt? Tap to flip Answer 1000 watts. Question What is efficiency? Tap to flip Answer The fraction of the energy supplied to an object or system that it transfers usefully. Question What is the equation for efficiency in terms of energy? Tap to flip Answer Efficiency = useful output energy transfer ÷ total input energy transfer. Question What is the equation for efficiency in terms of power? Tap to flip Answer Efficiency = useful power output ÷ total power input. Question How does friction dissipate energy? Tap to flip Answer It makes particles vibrate more quickly, which heats up the surroundings. Question How does drag dissipate energy? Tap to flip Answer It makes particles in the surroundings move more quickly. Question Energy transfers usually heat the surroundings. In what store does that dissipated energy end up? Tap to flip Answer A thermal store. Question What is the equation for the energy in an object's kinetic store? Tap to flip Answer Ek = ½ m v² (½ × mass × speed²). Question What happens to an object's kinetic energy if its mass doubles? Tap to flip Answer It doubles. Question What happens to an object's kinetic energy if its speed doubles? Tap to flip Answer It increases by four times. Question When calculating Ek = ½ m v², which quantity alone is squared? Tap to flip Answer Only the speed (v). Question Because of which two properties do objects have energy in the gravitational store? Tap to flip Answer Their mass and their height. Question What is the equation for weight? Tap to flip Answer Weight = mass × gravitational field strength (W = m g). Question In what unit is weight measured? Tap to flip Answer Newtons (N). Question What is gravitational field strength, g? Tap to flip Answer The force per kilogram caused by a gravitational field. Question What is the equation for gravitational potential energy? Tap to flip Answer Ep = mass × gravitational field strength × height (m g h). Question When an object moves upwards, work is done against which force? Tap to flip Answer The gravitational force. Question What does the gravitational force do to a falling object? Tap to flip Answer It does work to speed the object up. Question In an ideal situation, how much energy is dissipated? Tap to flip Answer None. Question As an object changes height, what is its change in gravitational potential energy equal to? Tap to flip Answer Its change in kinetic energy. Question What is the extension of a spring? Tap to flip Answer The increase from its original length when it is stretched. Question What is elastic deformation of a spring? Tap to flip Answer A stretch after which the spring returns to its original shape when the stretching force is removed. Question What is inelastic deformation of a spring? Tap to flip Answer A stretch that leaves the spring permanently out of shape. Question What is the limit of proportionality of a spring? Tap to flip Answer The largest extension it can have before it is stretched out of shape. Question What does the spring constant of a spring measure? Tap to flip Answer How stiff the spring is: how hard it is to stretch or compress. Question The spring constant (k) is the force needed to extend or compress an elastic object by how much? Tap to flip Answer One metre. Question What does Hooke's law state? Tap to flip Answer For elastic deformations, extension (or compression) is directly proportional to the force applied. Question What is the equation linking force on a spring, spring constant and extension? Tap to flip Answer Force = spring constant × extension (F = k e). Question Is a spring with a bigger spring constant easier or harder to stretch? Tap to flip Answer Harder to stretch (or compress). Question When is there energy in an object's elastic store? Tap to flip Answer When an elastic object is stretched, compressed or bent out of shape. Question In what unit is the spring constant measured? Tap to flip Answer Newtons per metre (N/m). Question What happens to the energy in a stretched spring if its stiffness doubles? Tap to flip Answer It doubles. Question What happens to the energy in a stretched spring if its extension doubles? Tap to flip Answer It increases by four times. Question What is the equation for the energy in a stretched spring? Tap to flip Answer Ee = ½ × spring constant × (extension)² (½ k e²). Question When calculating Ee = ½ k e², which quantity alone is squared? Tap to flip Answer Only the extension (e). Where this deck sits in the curriculum Curriculum National Curriculum for England Stage GCSE (Years 10–11) Course GCSE Physics Unit Energy of moving objects Exam boards AQA, Edexcel, OCR Tiers foundation and higher England's National Curriculum sets what is taught; the units and their order are Oak National Academy's. Flash Feed is not affiliated with Oak or any exam board.
How this deck was checked On 2026-11-02, every card was compared with its source: the lessons of Oak National Academy, a public body funded by England's Department for Education that publishes lessons for the national curriculum. Because the cards come from those lessons, no second source was sought. The comparison was done automatically, not by a teacher, so a card can still be wrong. Flash Feed is not affiliated with any source named here.
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A Physics lesson by Oak National Academy licensed under Open Government Licence (OGL)
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